Vulnerabilities > CVE-2019-3855 - Integer Overflow or Wraparound vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Forced Integer Overflow This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
Nessus
NASL family MacOS X Local Security Checks NASL id MACOSX_LIBSSH2_CVE_2019_3855.NASL description An integer overflow condition exists in libssh2 before 1.8.1 due to the way packets are read from the server. An authenticated, local attacker can exploit this if they have already compromised an SSH server. The attacker may be able to execute code on the system of users who connect to the SSH server. last seen 2020-04-30 modified 2020-04-21 plugin id 135851 published 2020-04-21 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135851 title libssh2 < 1.8.1 Integer Overflow Vulnerability. NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-1652.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 126453 published 2019-07-03 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126453 title RHEL 6 : libssh2 (RHSA-2019:1652) NASL family Scientific Linux Local Security Checks NASL id SL_20190702_LIBSSH2_ON_SL6_X.NASL description Security Fix(es) : - libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) - libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) - libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) - libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) last seen 2020-03-18 modified 2019-07-03 plugin id 126454 published 2019-07-03 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126454 title Scientific Linux Security Update : libssh2 on SL6.x i386/x86_64 (20190702) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-1_0-0220_LIBSSH2.NASL description An update of the libssh2 package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 125158 published 2019-05-15 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125158 title Photon OS 1.0: Libssh2 PHSA-2019-1.0-0220 NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-1943.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 7.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 127630 published 2019-08-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127630 title RHEL 7 : libssh2 (RHSA-2019:1943) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0179_LIBSSH2.NASL description The remote NewStart CGSL host, running version MAIN 4.06, has libssh2 packages installed that are affected by multiple vulnerabilities: - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3855) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3856) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3857) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error. (CVE-2019-3863) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 128705 published 2019-09-11 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/128705 title NewStart CGSL MAIN 4.06 : libssh2 Multiple Vulnerabilities (NS-SA-2019-0179) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1309.NASL description According to the versions of the libssh2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An out of bounds read flaw was discovered in libssh2 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3858) - An out of bounds read flaw was discovered in libssh2 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3859) - An out of bounds read flaw was discovered in libssh2 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3860) - An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3861) - An out of bounds read flaw was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3862) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-06 modified 2019-05-01 plugin id 124436 published 2019-05-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124436 title EulerOS 2.0 SP3 : libssh2 (EulerOS-SA-2019-1309) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_6E58E1E92636413E9F844C0E21143628.NASL description libssh2 developers report : - Defend against possible integer overflows in comp_method_zlib_decomp. - Defend against writing beyond the end of the payload in _libssh2_transport_read(). - Sanitize padding_length - _libssh2_transport_read(). - This prevents an underflow resulting in a potential out-of-bounds read if a server sends a too-large padding_length, possibly with malicious intent. - Prevent zero-byte allocation in sftp_packet_read() which could lead to an out-of-bounds read. - Check the length of data passed to sftp_packet_add() to prevent out-of-bounds reads. - Add a required_size parameter to sftp_packet_require et. al. to require callers of these functions to handle packets that are too short. - Additional length checks to prevent out-of-bounds reads and writes in _libssh2_packet_add(). last seen 2020-06-01 modified 2020-06-02 plugin id 124182 published 2019-04-19 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124182 title FreeBSD : libssh2 -- multiple issues (6e58e1e9-2636-413e-9f84-4c0e21143628) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1308.NASL description According to the versions of the libssh2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An out of bounds read flaw was discovered in libssh2 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3858) - An out of bounds read flaw was discovered in libssh2 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3859) - An out of bounds read flaw was discovered in libssh2 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3860) - An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3861) - An out of bounds read flaw was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3862) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-06 modified 2019-05-01 plugin id 124435 published 2019-05-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124435 title EulerOS 2.0 SP2 : libssh2 (EulerOS-SA-2019-1308) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-1_0-0220_HAPROXY.NASL description An update of the haproxy package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 125157 published 2019-05-15 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125157 title Photon OS 1.0: Haproxy PHSA-2019-1.0-0220 NASL family Fedora Local Security Checks NASL id FEDORA_2019-9D85600FC7.NASL description A vulnerability was discovered in libssh2 before 1.9.0, `kex_method_diffie_hellman_group_exchange_sha256_key_exchange` in `kex.c` has an integer overflow that could lead to an out-of-bounds write in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. This is related to an `_libssh2_check_length` mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855. This update, to the latest current upstream release 1.9.0, addresses this security issue and also includes a number of other bug fixes and enhancements as described in the package changelog. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 127521 published 2019-08-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127521 title Fedora 30 : libssh2 (2019-9d85600fc7) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-1_0-0220_PYTHON2.NASL description An update of the python2 package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 125159 published 2019-05-15 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125159 title Photon OS 1.0: Python2 PHSA-2019-1.0-0220 NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2019-0679.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 123560 published 2019-04-02 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123560 title CentOS 7 : libssh2 (CESA-2019:0679) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1075.NASL description This update for libssh2_org fixes the following issues : Security issues fixed: 	 - CVE-2019-3861: Fixed Out-of-bounds reads with specially crafted SSH packets (bsc#1128490). - CVE-2019-3862: Fixed Out-of-bounds memory comparison with specially crafted message channel request packet (bsc#1128492). - CVE-2019-3860: Fixed Out-of-bounds reads with specially crafted SFTP packets (bsc#1128481). - CVE-2019-3863: Fixed an Integer overflow in user authenticate keyboard interactive which could allow out-of-bounds writes with specially crafted keyboard responses (bsc#1128493). - CVE-2019-3856: Fixed a potential Integer overflow in keyboard interactive handling which could allow out-of-bounds write with specially crafted payload (bsc#1128472). - CVE-2019-3859: Fixed Out-of-bounds reads with specially crafted payloads due to unchecked use of _libssh2_packet_require and _libssh2_packet_requirev (bsc#1128480). - CVE-2019-3855: Fixed a potential Integer overflow in transport read which could allow out-of-bounds write with specially crafted payload (bsc#1128471). - CVE-2019-3858: Fixed a potential zero-byte allocation which could lead to an out-of-bounds read with a specially crafted SFTP packet (bsc#1128476). - CVE-2019-3857: Fixed a potential Integer overflow which could lead to zero-byte allocation and out-of-bounds with specially crafted message channel request SSH packet (bsc#1128474). Other issue addressed : - Libbssh2 will stop using keys unsupported types in the known_hosts file (bsc#1091236). This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 123494 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123494 title openSUSE Security Update : libssh2_org (openSUSE-2019-1075) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2019-1175.NASL description From Red Hat Security Advisory 2019:1175 : An update for the virt:rhel module is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems. Security Fix(es) : * A flaw was found in the implementation of the last seen 2020-06-01 modified 2020-06-02 plugin id 127584 published 2019-08-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127584 title Oracle Linux 8 : virt:rhel (ELSA-2019-1175) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-13982-1.NASL description This update for libssh2_org fixes the following issues : Security issues fixed : CVE-2019-3861: Fixed Out-of-bounds reads with specially crafted SSH packets (bsc#1128490). CVE-2019-3862: Fixed Out-of-bounds memory comparison with specially crafted message channel request packet (bsc#1128492). CVE-2019-3860: Fixed Out-of-bounds reads with specially crafted SFTP packets (bsc#1128481). CVE-2019-3863: Fixed an Integer overflow in user authenicate keyboard interactive which could allow out-of-bounds writes with specially crafted keyboard responses (bsc#1128493). CVE-2019-3856: Fixed a potential Integer overflow in keyboard interactive handling which could allow out-of-bounds write with specially crafted payload (bsc#1128472). CVE-2019-3859: Fixed Out-of-bounds reads with specially crafted payloads due to unchecked use of _libssh2_packet_require and _libssh2_packet_requirev (bsc#1128480). CVE-2019-3855: Fixed a potential Integer overflow in transport read which could allow out-of-bounds write with specially crafted payload (bsc#1128471). CVE-2019-3858: Fixed a potential zero-byte allocation which could lead to an out-of-bounds read with a specially crafted SFTP packet (bsc#1128476). CVE-2019-3857: Fixed a potential Integer overflow which could lead to zero-byte allocation and out-of-bounds with specially crafted message channel request SSH packet (bsc#1128474). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 122971 published 2019-03-20 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122971 title SUSE SLES11 Security Update : libssh2_org (SUSE-SU-2019:13982-1) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0169_LIBSSH2.NASL description The remote NewStart CGSL host, running version MAIN 4.05, has libssh2 packages installed that are affected by multiple vulnerabilities: - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3855) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3856) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3857) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error. (CVE-2019-3863) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 127458 published 2019-08-12 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127458 title NewStart CGSL MAIN 4.05 : libssh2 Multiple Vulnerabilities (NS-SA-2019-0169) NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2019-1199.NASL description An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) A vulnerability was found in in libssh2 where a server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) last seen 2020-06-01 modified 2020-06-02 plugin id 124305 published 2019-04-26 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124305 title Amazon Linux 2 : libssh2 (ALAS-2019-1199) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-2399.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 7.3 Advanced Update Support, Red Hat Enterprise Linux 7.3 Telco Extended Update Support, and Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 127716 published 2019-08-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127716 title RHEL 7 : libssh2 (RHSA-2019:2399) NASL family Fedora Local Security Checks NASL id FEDORA_2019-3348CB4934.NASL description This update addresses various overflow conditions that could result in possible memory read/write out of bounds errors or zero byte allocations when connected to a malicious server. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 123760 published 2019-04-05 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123760 title Fedora 28 : libssh2 (2019-3348cb4934) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1310.NASL description According to the versions of the libssh2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An out of bounds read flaw was discovered in libssh2 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3858) - An out of bounds read flaw was discovered in libssh2 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3859) - An out of bounds read flaw was discovered in libssh2 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3860) - An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3861) - An out of bounds read flaw was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3862) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-06 modified 2019-05-01 plugin id 124437 published 2019-05-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124437 title EulerOS 2.0 SP5 : libssh2 (EulerOS-SA-2019-1310) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4431.NASL description Chris Coulson discovered several vulnerabilities in libssh2, a SSH2 client-side library, which could result in denial of service, information leaks or the execution of arbitrary code. last seen 2020-06-01 modified 2020-06-02 plugin id 124039 published 2019-04-15 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124039 title Debian DSA-4431-1 : libssh2 - security update NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1393.NASL description According to the versions of the libssh2 package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - A type confusion issue was found in the way libssh2 generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters.(CVE-2016-0787) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 124896 published 2019-05-14 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124896 title EulerOS Virtualization for ARM 64 3.0.1.0 : libssh2 (EulerOS-SA-2019-1393) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1429.NASL description According to the versions of the libssh2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - A type confusion issue was found in the way libssh2 generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters.(CVE-2016-0787) - A flaw was found in the way the kex_agree_methods() function of libssh2 performed a key exchange when negotiating a new SSH session. A man-in-the-middle attacker could use a crafted SSH_MSG_KEXINIT packet to crash a connecting libssh2 client.(CVE-2015-1782) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) - An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.(CVE-2019-3862) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) - An out of bounds read flaw was discovered in libssh2 before 1.8.1 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.(CVE-2019-3858) - An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.(CVE-2019-3859) - An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.(CVE-2019-3860) - An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.(CVE-2019-3861) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 124932 published 2019-05-14 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124932 title EulerOS Virtualization 3.0.1.0 : libssh2 (EulerOS-SA-2019-1429) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-1_0-0220_CAIRO.NASL description An update of the cairo package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 125156 published 2019-05-15 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125156 title Photon OS 1.0: Cairo PHSA-2019-1.0-0220 NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1109.NASL description This update for libssh2_org fixes the following issues : Security issues fixed:	 - CVE-2019-3861: Fixed Out-of-bounds reads with specially crafted SSH packets (bsc#1128490). - CVE-2019-3862: Fixed Out-of-bounds memory comparison with specially crafted message channel request packet (bsc#1128492). - CVE-2019-3860: Fixed Out-of-bounds reads with specially crafted SFTP packets (bsc#1128481). - CVE-2019-3863: Fixed an Integer overflow in user authenicate keyboard interactive which could allow out-of-bounds writes with specially crafted keyboard responses (bsc#1128493). - CVE-2019-3856: Fixed a potential Integer overflow in keyboard interactive handling which could allow out-of-bounds write with specially crafted payload (bsc#1128472). - CVE-2019-3859: Fixed Out-of-bounds reads with specially crafted payloads due to unchecked use of _libssh2_packet_require and _libssh2_packet_requirev (bsc#1128480). - CVE-2019-3855: Fixed a potential Integer overflow in transport read which could allow out-of-bounds write with specially crafted payload (bsc#1128471). - CVE-2019-3858: Fixed a potential zero-byte allocation which could lead to an out-of-bounds read with a specially crafted SFTP packet (bsc#1128476). - CVE-2019-3857: Fixed a potential Integer overflow which could lead to zero-byte allocation and out-of-bounds with specially crafted message channel request SSH packet (bsc#1128474). This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 123656 published 2019-04-03 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123656 title openSUSE Security Update : libssh2_org (openSUSE-2019-1109) NASL family Scientific Linux Local Security Checks NASL id SL_20190328_LIBSSH2_ON_SL7_X.NASL description Security Fix(es) : - libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) - libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) - libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) - libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) last seen 2020-03-18 modified 2019-03-29 plugin id 123489 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123489 title Scientific Linux Security Update : libssh2 on SL7.x x86_64 (20190328) NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2019-077-01.NASL description New libssh2 packages are available for Slackware 14.2 and -current to fix security issues. last seen 2020-06-01 modified 2020-06-02 plugin id 122940 published 2019-03-19 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122940 title Slackware 14.2 / current : libssh2 (SSA:2019-077-01) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-1_0-0220_SYSTEMD.NASL description An update of the systemd package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 125160 published 2019-05-15 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125160 title Photon OS 1.0: Systemd PHSA-2019-1.0-0220 NASL family Virtuozzo Local Security Checks NASL id VIRTUOZZO_VZLSA-2019-1652.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Note that Tenable Network Security has attempted to extract the preceding description block directly from the corresponding Red Hat security advisory. Virtuozzo provides no description for VZLSA advisories. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 126505 published 2019-07-05 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126505 title Virtuozzo 6 : libssh2 / libssh2-devel / libssh2-docs (VZLSA-2019-1652) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2019-1652.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 126480 published 2019-07-05 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126480 title CentOS 6 : libssh2 (CESA-2019:1652) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2019-1254.NASL description An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) last seen 2020-06-01 modified 2020-06-02 plugin id 127810 published 2019-08-13 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127810 title Amazon Linux AMI : libssh2 (ALAS-2019-1254) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0655-1.NASL description This update for libssh2_org fixes the following issues : Security issues fixed : CVE-2019-3861: Fixed Out-of-bounds reads with specially crafted SSH packets (bsc#1128490). CVE-2019-3862: Fixed Out-of-bounds memory comparison with specially crafted message channel request packet (bsc#1128492). CVE-2019-3860: Fixed Out-of-bounds reads with specially crafted SFTP packets (bsc#1128481). CVE-2019-3863: Fixed an Integer overflow in user authenticate keyboard interactive which could allow out-of-bounds writes with specially crafted keyboard responses (bsc#1128493). CVE-2019-3856: Fixed a potential Integer overflow in keyboard interactive handling which could allow out-of-bounds write with specially crafted payload (bsc#1128472). CVE-2019-3859: Fixed Out-of-bounds reads with specially crafted payloads due to unchecked use of _libssh2_packet_require and _libssh2_packet_requirev (bsc#1128480). CVE-2019-3855: Fixed a potential Integer overflow in transport read which could allow out-of-bounds write with specially crafted payload (bsc#1128471). CVE-2019-3858: Fixed a potential zero-byte allocation which could lead to an out-of-bounds read with a specially crafted SFTP packet (bsc#1128476). CVE-2019-3857: Fixed a potential Integer overflow which could lead to zero-byte allocation and out-of-bounds with specially crafted message channel request SSH packet (bsc#1128474). Other issue addressed: Libbssh2 will stop using keys unsupported types in the known_hosts file (bsc#1091236). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 122997 published 2019-03-21 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122997 title SUSE SLED12 / SLES12 Security Update : libssh2_org (SUSE-SU-2019:0655-1) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2019-1652.NASL description From Red Hat Security Advisory 2019:1652 : An update for libssh2 is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 126451 published 2019-07-03 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126451 title Oracle Linux 6 : libssh2 (ELSA-2019-1652) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-1175.NASL description An update for the virt:rhel module is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems. Security Fix(es) : * A flaw was found in the implementation of the last seen 2020-05-23 modified 2019-05-14 plugin id 125041 published 2019-05-14 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125041 title RHEL 8 : virt:rhel (RHSA-2019:1175) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-1791.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 7.5 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 126759 published 2019-07-17 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126759 title RHEL 7 : libssh2 (RHSA-2019:1791) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2019-0679.NASL description From Red Hat Security Advisory 2019:0679 : An update for libssh2 is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 123483 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123483 title Oracle Linux 7 : libssh2 (ELSA-2019-0679) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0073_LIBSSH2.NASL description The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has libssh2 packages installed that are affected by multiple vulnerabilities: - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3855) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3856) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. (CVE-2019-3857) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error. (CVE-2019-3863) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 127279 published 2019-08-12 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127279 title NewStart CGSL CORE 5.04 / MAIN 5.04 : libssh2 Multiple Vulnerabilities (NS-SA-2019-0073) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1362.NASL description According to the versions of the libssh2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3855) - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3856) - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.(CVE-2019-3857) - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.(CVE-2019-3863) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 124740 published 2019-05-10 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124740 title EulerOS Virtualization 2.5.3 : libssh2 (EulerOS-SA-2019-1362) NASL family Fedora Local Security Checks NASL id FEDORA_2019-70A9D4F970.NASL description This update addresses various overflow conditions that could result in possible memory read/write out of bounds errors or zero byte allocations when connected to a malicious server. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 124503 published 2019-05-02 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124503 title Fedora 30 : libssh2 (2019-70a9d4f970) NASL family Fedora Local Security Checks NASL id FEDORA_2019-5885663621.NASL description A vulnerability was discovered in libssh2 before 1.9.0, `kex_method_diffie_hellman_group_exchange_sha256_key_exchange` in `kex.c` has an integer overflow that could lead to an out-of-bounds write in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. This is related to an `_libssh2_check_length` mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855. This update, to the latest current upstream release 1.9.0, addresses this security issue and also includes a number of other bug fixes and enhancements as described in the package changelog. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 127512 published 2019-08-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127512 title Fedora 29 : libssh2 (2019-5885663621) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-0679.NASL description An update for libssh2 is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The libssh2 packages provide a library that implements the SSH2 protocol. Security Fix(es) : * libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855) * libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856) * libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857) * libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 123486 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123486 title RHEL 7 : libssh2 (RHSA-2019:0679) NASL family Fedora Local Security Checks NASL id FEDORA_2019-F31C14682F.NASL description This update addresses various overflow conditions that could result in possible memory read/write out of bounds errors or zero byte allocations when connected to a malicious server. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 123052 published 2019-03-25 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123052 title Fedora 29 : libssh2 (2019-f31c14682f)
Redhat
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The Hacker News
| id | THN:B9050A4E7D2CE55A80B70F1870DE2C24 |
| last seen | 2019-03-19 |
| modified | 2019-03-19 |
| published | 2019-03-19 |
| reporter | The Hacker News |
| source | https://thehackernews.com/2019/03/libssh2-vulnerabilities.html |
| title | Libssh Releases Update to Patch 9 New Security Vulnerabilities |
References
- https://www.libssh2.org/CVE-2019-3855.html
- https://seclists.org/bugtraq/2019/Mar/25
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855
- http://www.securityfocus.com/bid/107485
- http://www.openwall.com/lists/oss-security/2019/03/18/3
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
- https://security.netapp.com/advisory/ntap-20190327-0005/
- https://access.redhat.com/errata/RHSA-2019:0679
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
- https://www.debian.org/security/2019/dsa-4431
- https://seclists.org/bugtraq/2019/Apr/25
- https://access.redhat.com/errata/RHSA-2019:1175
- https://access.redhat.com/errata/RHSA-2019:1652
- https://access.redhat.com/errata/RHSA-2019:1791
- https://access.redhat.com/errata/RHSA-2019:1943
- https://access.redhat.com/errata/RHSA-2019:2399
- https://support.apple.com/kb/HT210609
- https://seclists.org/bugtraq/2019/Sep/49
- http://seclists.org/fulldisclosure/2019/Sep/42
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/