Vulnerabilities > CVE-2017-14496 - Integer Underflow (Wrap or Wraparound) vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
Integer underflow in the add_pseudoheader function in dnsmasq before 2.78 , when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service via a crafted DNS request.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Exploit-Db
| description | Dnsmasq < 2.78 - Integer Underflow. CVE-2017-14496. Dos exploit for Multiple platform |
| file | exploits/multiple/dos/42946.py |
| id | EDB-ID:42946 |
| last seen | 2017-10-04 |
| modified | 2017-10-02 |
| platform | multiple |
| port | |
| published | 2017-10-02 |
| reporter | Exploit-DB |
| source | https://www.exploit-db.com/download/42946/ |
| title | Dnsmasq < 2.78 - Integer Underflow |
| type | dos |
Nessus
NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2617-1.NASL description This update for dnsmasq fixes the following security issues : - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354] - CVE-2017-14492: heap based overflow. [bsc#1060355] - CVE-2017-14493: stack based overflow. [bsc#1060360] - CVE-2017-14494: DHCP - info leak. [bsc#1060361] - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362] - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364] This update brings a (small) potential incompatibility in the handling of last seen 2020-05-09 modified 2017-10-03 plugin id 103638 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103638 title SUSE SLES11 Security Update : dnsmasq (SUSE-SU-2017:2617-1) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2017-0035_DNSMASQ.NASL description An update of the dnsmasq package has been released. last seen 2020-03-17 modified 2019-02-07 plugin id 121733 published 2019-02-07 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/121733 title Photon OS 1.0: Dnsmasq PHSA-2017-0035 NASL family Fedora Local Security Checks NASL id FEDORA_2017-515264AE24.NASL description CVE-2017-14491 CVE-2017-14492 CVE-2017-14493 CVE-2017-14494 CVE-2017-14495 CVE-2017-14496 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 2020-06-05 modified 2017-10-24 plugin id 104110 published 2017-10-24 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/104110 title Fedora 25 : dnsmasq (2017-515264ae24) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2618-1.NASL description This update for dnsmasq fixes the following security issues : - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354] - CVE-2017-14492: heap based overflow. [bsc#1060355] - CVE-2017-14493: stack based overflow. [bsc#1060360] - CVE-2017-14494: DHCP - info leak. [bsc#1060361] - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362] - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364] 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 2020-05-09 modified 2017-10-03 plugin id 103639 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103639 title SUSE SLED12 / SLES12 Security Update : dnsmasq (SUSE-SU-2017:2618-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2616-1.NASL description This update for dnsmasq fixes the following issues. Remedy the following security issues : - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354] - CVE-2017-14492: heap based overflow. [bsc#1060355] - CVE-2017-14493: stack based overflow. [bsc#1060360] - CVE-2017-14494: DHCP - info leak. [bsc#1060361] - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362] - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364] - Prevent a man-in-the-middle attack (bsc#972164, fate#321175). Furthermore, the following issues have been fixed : - Fix DHCP relaying, broken in 2.76 and 2.77. - Update to version 2.78 (fate#321175, fate#322030, bsc#1035227). - Fix PXE booting for UEFI architectures (fate#322030). - Drop PrivateDevices=yes which breaks logging (bsc#902511, bsc#904537) - Build with support for DNSSEC (fate#318323, bsc#908137). Please note that this update brings a (small) potential incompatibility in the handling of last seen 2020-05-09 modified 2017-10-03 plugin id 103637 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103637 title SUSE SLES12 Security Update : dnsmasq (SUSE-SU-2017:2616-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-1116.NASL description This update for dnsmasq fixes the following security issues : - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354] - CVE-2017-14492: heap based overflow. [bsc#1060355] - CVE-2017-14493: stack based overflow. [bsc#1060360] - CVE-2017-14494: DHCP - info leak. [bsc#1060361] - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362] - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364] This update was imported from the SUSE:SLE-12-SP1:Update update project. last seen 2020-06-05 modified 2017-10-03 plugin id 103623 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103623 title openSUSE Security Update : dnsmasq (openSUSE-2017-1116) NASL family Fedora Local Security Checks NASL id FEDORA_2017-7106A157F5.NASL description CVE-2017-14491 CVE-2017-14492 CVE-2017-14493 CVE-2017-14494 CVE-2017-14495 CVE-2017-14496 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 2020-06-05 modified 2018-01-15 plugin id 105901 published 2018-01-15 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/105901 title Fedora 27 : dnsmasq (2017-7106a157f5) NASL family Firewalls NASL id PFSENSE_2_3_5.NASL description According to its self-reported version number, the remote pfSense install is affected by multiple vulnerabilities as stated in the referenced vendor advisories. last seen 2020-05-09 modified 2018-04-13 plugin id 109037 published 2018-04-13 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/109037 title pfSense < 2.3.5 Multiple Vulnerabilities (KRACK) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2017-0035.NASL description An update of [dnsmasq] packages for PhotonOS has been released. last seen 2019-02-08 modified 2019-02-07 plugin id 111884 published 2018-08-17 reporter Tenable source https://www.tenable.com/plugins/index.php?view=single&id=111884 title Photon OS 1.0: Dnsmasq PHSA-2017-0035 (deprecated) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3989.NASL description Felix Wilhelm, Fermin J. Serna, Gabriel Campana, Kevin Hamacher, Ron Bowes and Gynvael Coldwind of the Google Security Team discovered several vulnerabilities in dnsmasq, a small caching DNS proxy and DHCP/TFTP server, which may result in denial of service, information leak or the execution of arbitrary code. last seen 2020-05-09 modified 2017-10-03 plugin id 103608 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103608 title Debian DSA-3989-1 : dnsmasq - security update NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-2836.NASL description From Red Hat Security Advisory 2017:2836 : An update for dnsmasq is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Critical. 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 dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es) : * A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491) * A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless. (CVE-2017-14492) * A stack-based buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code. (CVE-2017-14493) * An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data. (CVE-2017-14494) * A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14495) * An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14496) Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting these issues. last seen 2020-05-09 modified 2017-10-03 plugin id 103625 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103625 title Oracle Linux 7 : dnsmasq (ELSA-2017-2836) NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2019-1251.NASL description A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14495) An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14496) A stack buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code. (CVE-2017-14493) An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data. (CVE-2017-14494) A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless. (CVE-2017-14492) A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491) last seen 2020-06-01 modified 2020-06-02 plugin id 126963 published 2019-07-24 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/126963 title Amazon Linux 2 : dnsmasq (ALAS-2019-1251) NASL family Fedora Local Security Checks NASL id FEDORA_2017-24F067299E.NASL description CVE-2017-14491 CVE-2017-14492 CVE-2017-14493 CVE-2017-14494 CVE-2017-14495 CVE-2017-14496 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 2020-06-05 modified 2017-10-18 plugin id 103888 published 2017-10-18 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103888 title Fedora 26 : dnsmasq (2017-24f067299e) NASL family Scientific Linux Local Security Checks NASL id SL_20171002_DNSMASQ_ON_SL7_X.NASL description Security Fix(es) : - A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491) - A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra- names, ra-advrouter, or ra-stateless. (CVE-2017-14492) - A stack-based buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code. (CVE-2017-14493) - An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data. (CVE-2017-14494) - A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add- subnet. (CVE-2017-14495) - An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add- subnet. (CVE-2017-14496) last seen 2020-05-09 modified 2017-10-03 plugin id 103635 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103635 title Scientific Linux Security Update : dnsmasq on SL7.x x86_64 (20171002) NASL family DNS NASL id DNSMASQ_2_78.NASL description The version of dnsmasq installed on the remote host is prior to 2.78, and thus, is affected by the following vulnerabilities : - Denial of service related to handling DNS queries exceeding 512 bytes. (CVE-2017-13704) - Heap overflow related to handling DNS requests. (CVE-2017-14491) - Heap overflow related to IPv6 router advertisement handling. (CVE-2017-14492) - Stack overflow related to DHCPv6 request handling. (CVE-2017-14493) - Memory disclosure related to DHCPv6 packet handling. (CVE-2017-14494) - Denial of service related to handling DNS queries. (CVE-2017-14495) - Denial of service related to handling DNS queries. (CVE-2017-14496) last seen 2020-05-09 modified 2017-10-03 plugin id 103647 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103647 title dnsmasq < 2.78 Multiple Remote Vulnerabilities NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1380.NASL description According to the versions of the dnsmasq packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data.(CVE-2017-14494) - A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet.(CVE-2017-14495) - An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet.(CVE-2017-14496) - A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code.(CVE-2017-14491) - A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless.(CVE-2017-14492) - A stack buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code.(CVE-2017-14493) 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 124883 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/124883 title EulerOS Virtualization for ARM 64 3.0.1.0 : dnsmasq (EulerOS-SA-2019-1380) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-2836.NASL description An update for dnsmasq is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Critical. 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 dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es) : * A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491) * A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless. (CVE-2017-14492) * A stack-based buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code. (CVE-2017-14493) * An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data. (CVE-2017-14494) * A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14495) * An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14496) Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting these issues. last seen 2020-05-09 modified 2017-10-03 plugin id 103628 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103628 title RHEL 7 : dnsmasq (RHSA-2017:2836) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201710-27.NASL description The remote host is affected by the vulnerability described in GLSA-201710-27 (Dnsmasq: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Dnsmasq. Please review the references below for details. Impact : A remote attacker could execute arbitrary code or cause a Denial of Service condition via crafted DNS, IPv6, or DHCPv6 packets. Workaround : There is no known workaround at this time. last seen 2020-05-09 modified 2017-10-23 plugin id 104070 published 2017-10-23 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/104070 title GLSA-201710-27 : Dnsmasq: Multiple vulnerabilities NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_B77B5646A77811E7AC58B499BAEBFEAF.NASL description Google Project Zero reports : - CVE-2017-14491: Heap based overflow (2 bytes). Before 2.76 and this commit overflow was unrestricted. - CVE-2017-14492: Heap based overflow. - CVE-2017-14493: Stack Based overflow. - CVE-2017-14494: Information Leak - CVE-2017-14495: Lack of free() - CVE-2017-14496: Invalid boundary checks. Integer underflow leading to a huge memcpy. - CVE-2017-13704: Crash on large DNS query last seen 2020-05-09 modified 2017-10-03 plugin id 103620 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103620 title FreeBSD : dnsmasq -- multiple vulnerabilities (b77b5646-a778-11e7-ac58-b499baebfeaf) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2018-1285.NASL description According to the versions of the dnsmasq packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14495) - An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14496) As this issue only affects configurations using the add-mac, add-cpe-id, or add-subnet options, and these are not enabled by default in dnsmasq on EulerOS, this vulnerability may not actively affect the system at this time, but has the potential to do so if the configuration changes. Updating the version of these packages is the safest course of action. Note that Tenable Network Security has extracted most of 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 117729 published 2018-09-27 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/117729 title EulerOS 2.0 SP2 : dnsmasq (EulerOS-SA-2018-1285) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1423.NASL description According to the versions of the dnsmasq packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless.(CVE-2017-14492) - An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data.(CVE-2017-14494) - A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code.(CVE-2017-14491) - A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet.(CVE-2017-14495) - An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet.(CVE-2017-14496) - A stack buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code.(CVE-2017-14493) 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 124926 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/124926 title EulerOS Virtualization 3.0.1.0 : dnsmasq (EulerOS-SA-2019-1423) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2017-907.NASL description Information leak in the DHCPv6 relay code An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data. (CVE-2017-14494) Memory exhaustion vulnerability in the EDNS0 code A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14495) Integer underflow leading to buffer over-read in the EDNS0 code An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14496) Heap overflow in the code responsible for building DNS replies A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491) Heap overflow in the IPv6 router advertisement code A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless. (CVE-2017-14492) Stack buffer overflow in the DHCPv6 code A stack buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code. (CVE-2017-14493) last seen 2020-05-09 modified 2017-10-03 plugin id 103604 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103604 title Amazon Linux AMI : dnsmasq (ALAS-2017-907) NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2017-275-01.NASL description New dnsmasq packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues. last seen 2020-05-09 modified 2017-10-03 plugin id 103599 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103599 title Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : dnsmasq (SSA:2017-275-01) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3430-1.NASL description Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-14491) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled IPv6 router advertisements. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-14492) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DHCPv6 requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-14493) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DHCPv6 packets. A remote attacker could use this issue to possibly obtain sensitive memory contents. (CVE-2017-14494) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to consume memory, resulting in a denial of service. (CVE-2017-14495) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service. (CVE-2017-14496). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-09 modified 2017-10-03 plugin id 103641 published 2017-10-03 reporter Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103641 title Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : dnsmasq vulnerabilities (USN-3430-1) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-2836.NASL description An update for dnsmasq is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Critical. 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 dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es) : * A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491) * A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless. (CVE-2017-14492) * A stack-based buffer overflow was found in dnsmasq in the DHCPv6 code. An attacker on the local network could send a crafted DHCPv6 request to dnsmasq which would cause it to a crash or, potentially, execute arbitrary code. (CVE-2017-14493) * An information leak was found in dnsmasq in the DHCPv6 relay code. An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data. (CVE-2017-14494) * A memory exhaustion flaw was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14495) * An integer underflow flaw leading to a buffer over-read was found in dnsmasq in the EDNS0 code. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash. This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet. (CVE-2017-14496) Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting these issues. last seen 2020-05-09 modified 2017-10-03 plugin id 103605 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103605 title CentOS 7 : dnsmasq (CESA-2017:2836) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2619-1.NASL description This update for dnsmasq fixes the following security issues : - CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354] - CVE-2017-14492: heap based overflow. [bsc#1060355] - CVE-2017-14493: stack based overflow. [bsc#1060360] - CVE-2017-14494: DHCP - info leak. [bsc#1060361] - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362] - CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364] This update brings a (small) potential incompatibility in the handling of last seen 2020-05-09 modified 2017-10-03 plugin id 103640 published 2017-10-03 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/103640 title SUSE SLES11 Security Update : dnsmasq (SUSE-SU-2017:2619-1)
Packetstorm
| data source | https://packetstormsecurity.com/files/download/144462/dnsmask-underflow.txt |
| id | PACKETSTORM:144462 |
| last seen | 2017-10-03 |
| published | 2017-10-02 |
| reporter | Google Security Research |
| source | https://packetstormsecurity.com/files/144462/Dnsmasq-Integer-Underflow.html |
| title | Dnsmasq Integer Underflow |
Redhat
| advisories |
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| rpms |
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Seebug
| bulletinFamily | exploit |
| description | No description provided by source. |
| id | SSV:96623 |
| last seen | 2017-11-19 |
| modified | 2017-10-09 |
| published | 2017-10-09 |
| reporter | Root |
| source | https://www.seebug.org/vuldb/ssvid-96623 |
| title | Dnsmasq DoS Vulnerability(CVE-2017-14496) |
The Hacker News
| id | THN:D2096A5FA799B07E97FD2767D8E6C641 |
| last seen | 2018-01-27 |
| modified | 2017-10-03 |
| published | 2017-10-02 |
| reporter | Mohit Kumar |
| source | https://thehackernews.com/2017/10/dnsmasq-network-services.html |
| title | Google Finds 7 Security Flaws in Widely Used Dnsmasq Network Software |
References
- https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
- http://thekelleys.org.uk/dnsmasq/CHANGELOG
- https://source.android.com/security/bulletin/2017-10-01
- http://www.securitytracker.com/id/1039474
- https://www.exploit-db.com/exploits/42946/
- http://www.securityfocus.com/bid/101085
- https://www.kb.cert.org/vuls/id/973527
- http://nvidia.custhelp.com/app/answers/detail/a_id/4561
- https://security.gentoo.org/glsa/201710-27
- http://www.securityfocus.com/bid/101977
- https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt
- https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html
- http://www.debian.org/security/2017/dsa-3989
- http://www.ubuntu.com/usn/USN-3430-1
- http://www.ubuntu.com/usn/USN-3430-2
- https://access.redhat.com/errata/RHSA-2017:2836
- https://access.redhat.com/security/vulnerabilities/3199382
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html