Vulnerabilities > CVE-2019-6109 - Improper Encoding or Escaping of Output vulnerability in multiple products
Attack vector
NETWORK Attack complexity
HIGH Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
NONE Summary
An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Embedding Scripts in Non-Script Elements This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an attacker to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote attacker to collect and interpret the output of said attack.
- Simple Script Injection An attacker embeds malicious scripts in content that will be served to web browsers. The goal of the attack is for the target software, the client-side browser, to execute the script with the users' privilege level. An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute code and scripts. Web browsers, for example, have some simple security controls in place, but if a remote attacker is allowed to execute scripts (through injecting them in to user-generated content like bulletin boards) then these controls may be bypassed. Further, these attacks are very difficult for an end user to detect.
- User-Controlled Filename An attack of this type involves an attacker inserting malicious characters (such as a XSS redirection) into a filename, directly or indirectly that is then used by the target software to generate HTML text or other potentially executable content. Many websites rely on user-generated content and dynamically build resources like files, filenames, and URL links directly from user supplied data. In this attack pattern, the attacker uploads code that can execute in the client browser and/or redirect the client browser to a site that the attacker owns. All XSS attack payload variants can be used to pass and exploit these vulnerabilities.
- Web Logs Tampering Web Logs Tampering attacks involve an attacker injecting, deleting or otherwise tampering with the contents of web logs typically for the purposes of masking other malicious behavior. Additionally, writing malicious data to log files may target jobs, filters, reports, and other agents that process the logs in an asynchronous attack pattern. This pattern of attack is similar to "Log Injection-Tampering-Forging" except that in this case, the attack is targeting the logs of the web server and not the application.
Nessus
NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0132-1.NASL description This update for openssh fixes the following issues : Security issue fixed : CVE-2018-20685: Fixed an issue where scp client allows remote SSH servers to bypass intended access restrictions (bsc#1121571) CVE-2019-6109: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate terminal output via the object name, e.g. by inserting ANSI escape sequences (bsc#1121816) CVE-2019-6110: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate stderr output, e.g. by inserting ANSI escape sequences (bsc#1121818) CVE-2019-6111: Fixed an issue where the scp client would allow malicious remote SSH servers to execute directory traversal attacks and overwrite files (bsc#1121821) 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 2020-03-18 modified 2019-01-22 plugin id 121300 published 2019-01-22 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/121300 title SUSE SLED12 / SLES12 Security Update : openssh (SUSE-SU-2019:0132-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from SUSE update advisory SUSE-SU-2019:0132-1. # The text itself is copyright (C) SUSE. # include("compat.inc"); if (description) { script_id(121300); script_version("1.7"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/24"); script_cve_id("CVE-2018-20685", "CVE-2019-6109", "CVE-2019-6110", "CVE-2019-6111"); script_name(english:"SUSE SLED12 / SLES12 Security Update : openssh (SUSE-SU-2019:0132-1)"); script_summary(english:"Checks rpm output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote SUSE host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "This update for openssh fixes the following issues : Security issue fixed : CVE-2018-20685: Fixed an issue where scp client allows remote SSH servers to bypass intended access restrictions (bsc#1121571) CVE-2019-6109: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate terminal output via the object name, e.g. by inserting ANSI escape sequences (bsc#1121816) CVE-2019-6110: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate stderr output, e.g. by inserting ANSI escape sequences (bsc#1121818) CVE-2019-6111: Fixed an issue where the scp client would allow malicious remote SSH servers to execute directory traversal attacks and overwrite files (bsc#1121821) 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." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121571" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121816" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121818" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121821" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20685/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-6109/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-6110/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-6111/" ); # https://www.suse.com/support/update/announcement/2019/suse-su-20190132-1/ script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?2f3bb078" ); script_set_attribute( attribute:"solution", value: "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'. Alternatively you can run the command listed for your product : SUSE OpenStack Cloud 7:zypper in -t patch SUSE-OpenStack-Cloud-7-2019-132=1 SUSE Linux Enterprise Server for SAP 12-SP2:zypper in -t patch SUSE-SLE-SAP-12-SP2-2019-132=1 SUSE Linux Enterprise Server 12-SP4:zypper in -t patch SUSE-SLE-SERVER-12-SP4-2019-132=1 SUSE Linux Enterprise Server 12-SP3:zypper in -t patch SUSE-SLE-SERVER-12-SP3-2019-132=1 SUSE Linux Enterprise Server 12-SP2-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-132=1 SUSE Linux Enterprise Server 12-SP2-BCL:zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2019-132=1 SUSE Linux Enterprise Desktop 12-SP4:zypper in -t patch SUSE-SLE-DESKTOP-12-SP4-2019-132=1 SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch SUSE-SLE-DESKTOP-12-SP3-2019-132=1 SUSE Enterprise Storage 4:zypper in -t patch SUSE-Storage-4-2019-132=1 SUSE CaaS Platform ALL : To install this update, use the SUSE CaaS Platform Velum dashboard. It will inform you if it detects new updates and let you then trigger updating of the complete cluster in a controlled way. SUSE CaaS Platform 3.0 : To install this update, use the SUSE CaaS Platform Velum dashboard. It will inform you if it detects new updates and let you then trigger updating of the complete cluster in a controlled way. OpenStack Cloud Magnum Orchestration 7:zypper in -t patch SUSE-OpenStack-Cloud-Magnum-Orchestration-7-2019-132=1" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-6111"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-askpass-gnome"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-askpass-gnome-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-fips"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-helpers"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-helpers-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/10"); script_set_attribute(attribute:"patch_publication_date", value:"2019/01/21"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/22"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/SuSE/release"); if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE"); os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE"); os_ver = os_ver[1]; if (! preg(pattern:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "SUSE " + os_ver); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu); sp = get_kb_item("Host/SuSE/patchlevel"); if (isnull(sp)) sp = "0"; if (os_ver == "SLES12" && (! preg(pattern:"^(2|3|4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2/3/4", os_ver + " SP" + sp); if (os_ver == "SLED12" && (! preg(pattern:"^(3|4)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP3/4", os_ver + " SP" + sp); flag = 0; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-askpass-gnome-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-askpass-gnome-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-debugsource-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-fips-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-helpers-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"4", reference:"openssh-helpers-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-askpass-gnome-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-askpass-gnome-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-debugsource-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-fips-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-helpers-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"3", reference:"openssh-helpers-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-askpass-gnome-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-askpass-gnome-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-debugsource-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-fips-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-helpers-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-helpers-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-askpass-gnome-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-askpass-gnome-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-debugsource-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-fips-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-helpers-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLES12", sp:"2", reference:"openssh-helpers-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"openssh-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"openssh-askpass-gnome-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"openssh-askpass-gnome-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"openssh-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"openssh-debugsource-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"openssh-helpers-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"openssh-helpers-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"openssh-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"openssh-askpass-gnome-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"openssh-askpass-gnome-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"openssh-debuginfo-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"openssh-debugsource-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"openssh-helpers-7.2p2-74.35.1")) flag++; if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"openssh-helpers-debuginfo-7.2p2-74.35.1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openssh"); }NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1324.NASL description According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.(CVE-2019-6109) - An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).(CVE-2019-6111) 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 124610 published 2019-05-06 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124610 title EulerOS 2.0 SP5 : openssh (EulerOS-SA-2019-1324) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1355.NASL description According to the versions of the openssh packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.(CVE-2019-6109) - An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).(CVE-2019-6111) 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 124733 published 2019-05-10 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124733 title EulerOS Virtualization 2.5.3 : openssh (EulerOS-SA-2019-1355) NASL family Fedora Local Security Checks NASL id FEDORA_2019-0F4190CDB0.NASL description New upstream release with significantly reworked PKCS#11 support, GSSAPI key exchange and several fixes for CVE-2019-6111 and CVE-2019-6109 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 124599 published 2019-05-06 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/124599 title Fedora 30 : openssh (2019-0f4190cdb0) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0125-1.NASL description This update for openssh fixes the following issues : Security issue fixed : CVE-2018-20685: Fixed an issue where scp client allows remote SSH servers to bypass intended access restrictions (bsc#1121571) CVE-2019-6109: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate terminal output via the object name, e.g. by inserting ANSI escape sequences (bsc#1121816) CVE-2019-6110: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate stderr output, e.g. by inserting ANSI escape sequences (bsc#1121818) CVE-2019-6111: Fixed an issue where the scp client would allow malicious remote SSH servers to execute directory traversal attacks and overwrite files (bsc#1121821) 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 2020-03-18 modified 2019-01-22 plugin id 121295 published 2019-01-22 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/121295 title SUSE SLES12 Security Update : openssh (SUSE-SU-2019:0125-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-3702.NASL description An update for openssh is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. The following packages have been upgraded to a later upstream version: openssh (8.0p1). (BZ#1691045) Security Fix(es) : * openssh: scp client improper directory name validation (CVE-2018-20685) * openssh: Improper validation of object names allows malicious server to overwrite files via scp client (CVE-2019-6111) * openssh: Missing character encoding in progress display allows for spoofing of scp client output (CVE-2019-6109) 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. Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 Release Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 130569 published 2019-11-06 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130569 title RHEL 8 : openssh (RHSA-2019:3702) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3885-1.NASL description Harry Sintonen discovered multiple issues in the OpenSSH scp utility. If a user or automated system were tricked into connecting to an untrusted server, a remote attacker could possibly use these issues to write to arbitrary files, change directory permissions, and spoof client output. 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 2020-06-01 modified 2020-06-02 plugin id 122055 published 2019-02-08 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122055 title Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : openssh vulnerabilities (USN-3885-1) NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2019-1216.NASL description An issue was discovered in OpenSSH. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).(CVE-2019-6111) In OpenSSH, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.(CVE-2018-20685) An issue was discovered in OpenSSH. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.(CVE-2019-6109 ) last seen 2020-06-01 modified 2020-06-02 plugin id 125599 published 2019-05-31 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/125599 title Amazon Linux 2 : openssh (ALAS-2019-1216) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1630.NASL description According to the versions of the openssh packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.(CVE-2019-6109) - An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).(CVE-2019-6111) 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 125582 published 2019-05-30 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125582 title EulerOS Virtualization for ARM 64 3.0.2.0 : openssh (EulerOS-SA-2019-1630) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1426.NASL description According to the versions of the openssh packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.(CVE-2017-15906) - In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.(CVE-2018-20685) - An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.(CVE-2019-6109) - An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).(CVE-2019-6111) - OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.(CVE-2018-15473) 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 124929 published 2019-05-14 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124929 title EulerOS Virtualization 3.0.1.0 : openssh (EulerOS-SA-2019-1426) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1728.NASL description Multiple scp client vulnerabilities have been discovered in OpenSSH, the premier connectivity tool for secure remote shell login and secure file transfer. CVE-2018-20685 In scp.c, the scp client allowed remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact was modifying the permissions of the target directory on the client side. CVE-2019-6109 Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) was able to employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affected refresh_progress_meter() in progressmeter.c. CVE-2019-6111 Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performed cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) was able to overwrite arbitrary files in the scp client target directory. If recursive operation (-r) was performed, the server was able to manipulate subdirectories, as well (for example, to overwrite the .ssh/authorized_keys file). For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 123095 published 2019-03-26 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/123095 title Debian DLA-1728-1 : openssh security update NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-91.NASL description This update for openssh fixes the following issues : Security issues fixed : - CVE-2018-20685: Fixed an issue where scp client allows remote SSH servers to bypass intended access restrictions (bsc#1121571) - CVE-2019-6109: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate terminal output via the object name, e.g. by inserting ANSI escape sequences (bsc#1121816) - CVE-2019-6110: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate stderr output, e.g. by inserting ANSI escape sequences (bsc#1121818) - CVE-2019-6111: Fixed an issue where the scp client would allow malicious remote SSH servers to execute directory traversal attacks and overwrite files (bsc#1121821) This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-03-18 modified 2019-01-29 plugin id 121430 published 2019-01-29 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/121430 title openSUSE Security Update : openssh (openSUSE-2019-91) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-13931-1.NASL description This update for openssh fixes the following issues : Security issue fixed : CVE-2018-20685: Fixed an issue where scp client allows remote SSH servers to bypass intended access restrictions (bsc#1121571) CVE-2019-6109: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate terminal output via the object name, e.g. by inserting ANSI escape sequences (bsc#1121816) CVE-2019-6110: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate stderr output, e.g. by inserting ANSI escape sequences (bsc#1121818) CVE-2019-6111: Fixed an issue where the scp client would allow malicious remote SSH servers to execute directory traversal attacks and overwrite files (bsc#1121821) 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 2020-03-18 modified 2019-01-22 plugin id 121306 published 2019-01-22 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/121306 title SUSE SLES11 Security Update : openssh (SUSE-SU-2019:13931-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-93.NASL description This update for openssh fixes the following issues : Security issue fixed : - CVE-2018-20685: Fixed an issue where scp client allows remote SSH servers to bypass intended access restrictions (bsc#1121571) - CVE-2019-6109: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate terminal output via the object name, e.g. by inserting ANSI escape sequences (bsc#1121816) - CVE-2019-6110: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate stderr output, e.g. by inserting ANSI escape sequences (bsc#1121818) - CVE-2019-6111: Fixed an issue where the scp client would allow malicious remote SSH servers to execute directory traversal attacks and overwrite files (bsc#1121821) This update was imported from the SUSE:SLE-12-SP2:Update update project. last seen 2020-03-18 modified 2019-01-30 plugin id 121460 published 2019-01-30 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/121460 title openSUSE Security Update : openssh (openSUSE-2019-93) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2113.NASL description According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.(CVE-2019-6109) - An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).(CVE-2019-6111) 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 2020-05-03 modified 2019-11-12 plugin id 130822 published 2019-11-12 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/130822 title EulerOS 2.0 SP8 : openssh (EulerOS-SA-2019-2113) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-14030-1.NASL description This update for openssh fixes the following issues : Security vulnerabilities addressed : CVE-2019-6109: Fixed an character encoding issue in the progress display of the scp client that could be used to manipulate client output, allowing for spoofing during file transfers (bsc#1121816). CVE-2019-6111: Properly validate object names received by the scp client to prevent arbitrary file overwrites when interacting with a malicious SSH server (bsc#1121821). Other issues fixed: Fixed two race conditions in sshd relating to SIGHUP (bsc#1119183). Returned proper reason for port forwarding failures (bsc#1090671). Fixed SSHD termination of multichannel sessions with non-root users (bsc#1115550). 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 124321 published 2019-04-26 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124321 title SUSE SLES11 Security Update : openssh (SUSE-SU-2019:14030-1) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0060_OPENSSH.NASL description The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has openssh packages installed that are affected by multiple vulnerabilities: - In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side. (CVE-2018-20685) - An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c. (CVE-2019-6109) - In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred. (CVE-2019-6110) - An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man- in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file). (CVE-2019-6111) 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 127253 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/127253 title NewStart CGSL CORE 5.04 / MAIN 5.04 : openssh Multiple Vulnerabilities (NS-SA-2019-0060) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-307.NASL description This update for openssh fixes the following issues : Security vulnerabilities addressed : - CVE-2019-6109: Fixed an character encoding issue in the progress display of the scp client that could be used to manipulate client output, allowing for spoofing during file transfers (bsc#1121816) - CVE-2019-6111: Properly validate object names received by the scp client to prevent arbitrary file overwrites when interacting with a malicious SSH server (bsc#1121821) Other bug fixes and changes : - Handle brace expansion in scp when checking that filenames sent by the server side match what the client requested (bsc#1125687) This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 122743 published 2019-03-11 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/122743 title openSUSE Security Update : openssh (openSUSE-2019-307) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4387.NASL description Harry Sintonen from F-Secure Corporation discovered multiple vulnerabilities in OpenSSH, an implementation of the SSH protocol suite. All the vulnerabilities are in found in the scp client implementing the SCP protocol. - CVE-2018-20685 Due to improper directory name validation, the scp client allows servers to modify permissions of the target directory by using empty or dot directory name. - CVE-2019-6109 Due to missing character encoding in the progress display, the object name can be used to manipulate the client output, for example to employ ANSI codes to hide additional files being transferred. - CVE-2019-6111 Due to scp client insufficient input validation in path names sent by server, a malicious server can do arbitrary file overwrites in target directory. If the recursive (-r) option is provided, the server can also manipulate subdirectories as well. The check added in this version can lead to regression if the client and the server have differences in wildcard expansion rules. If the server is trusted for that purpose, the check can be disabled with a new -T option to the scp client. last seen 2020-06-01 modified 2020-06-02 plugin id 122068 published 2019-02-11 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/122068 title Debian DSA-4387-1 : openssh - security update NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0941-1.NASL description This update for openssh fixes the following issues : Security vulnerabilities addressed : CVE-2019-6109: Fixed an character encoding issue in the progress display of the scp client that could be used to manipulate client output, allowing for spoofing during file transfers (bsc#1121816). CVE-2019-6111: Properly validate object names received by the scp client to prevent arbitrary file overwrites when interacting with a malicious SSH server (bsc#1121821). Other issues fixed: Fixed two race conditions in sshd relating to SIGHUP (bsc#1119183). Returned proper reason for port forwarding failures (bsc#1090671). Fixed SSHD termination of multichannel sessions with non-root users (bsc#1115550). 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 124057 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/124057 title SUSE SLES12 Security Update : openssh (SUSE-SU-2019:0941-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1602.NASL description This update for openssh fixes the following issues : Security vulnerabilities addressed : - CVE-2019-6109: Fixed an character encoding issue in the progress display of the scp client that could be used to manipulate client output, allowing for spoofing during file transfers (bsc#1121816). - CVE-2019-6111: Properly validate object names received by the scp client to prevent arbitrary file overwrites when interacting with a malicious SSH server (bsc#1121821). Other issues fixed : - Fixed two race conditions in sshd relating to SIGHUP (bsc#1119183). - Returned proper reason for port forwarding failures (bsc#1090671). - Fixed a double free() in the KDF CAVS testing tool (bsc#1065237). This update was imported from the SUSE:SLE-12-SP2:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 126227 published 2019-06-25 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/126227 title openSUSE Security Update : openssh (openSUSE-2019-1602) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1908.NASL description According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.(CVE-2019-6109) - An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).(CVE-2019-6111) 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 2020-05-08 modified 2019-09-16 plugin id 128831 published 2019-09-16 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/128831 title EulerOS 2.0 SP5 : openssh (EulerOS-SA-2019-1908) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2020-1419.NASL description According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. NOTE: the discoverer states last seen 2020-05-06 modified 2020-04-15 plugin id 135548 published 2020-04-15 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135548 title EulerOS 2.0 SP3 : openssh (EulerOS-SA-2020-1419) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2019-1313.NASL description An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c. (CVE-2019-6109) An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file). (CVE-2019-6111) In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side. (CVE-2018-20685) last seen 2020-06-01 modified 2020-06-02 plugin id 130403 published 2019-10-31 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130403 title Amazon Linux AMI : openssh (ALAS-2019-1313) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0126-1.NASL description This update for openssh fixes the following issues : Security issues fixed : CVE-2018-20685: Fixed an issue where scp client allows remote SSH servers to bypass intended access restrictions (bsc#1121571) CVE-2019-6109: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate terminal output via the object name, e.g. by inserting ANSI escape sequences (bsc#1121816) CVE-2019-6110: Fixed an issue where the scp client would allow malicious remote SSH servers to manipulate stderr output, e.g. by inserting ANSI escape sequences (bsc#1121818) CVE-2019-6111: Fixed an issue where the scp client would allow malicious remote SSH servers to execute directory traversal attacks and overwrite files (bsc#1121821) 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 2020-03-18 modified 2019-01-22 plugin id 121296 published 2019-01-22 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/121296 title SUSE SLED15 / SLES15 Security Update : openssh (SUSE-SU-2019:0126-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0496-1.NASL description This update for openssh fixes the following issues : Security vulnerabilities addressed : CVE-2019-6109: Fixed an character encoding issue in the progress display of the scp client that could be used to manipulate client output, allowing for spoofing during file transfers (bsc#1121816) CVE-2019-6111: Properly validate object names received by the scp client to prevent arbitrary file overwrites when interacting with a malicious SSH server (bsc#1121821) Other bug fixes and changes: Handle brace expansion in scp when checking that filenames sent by the server side match what the client requested (bsc#1125687) 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 122473 published 2019-02-27 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/122473 title SUSE SLED15 / SLES15 Security Update : openssh (SUSE-SU-2019:0496-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-1524-1.NASL description This update for openssh fixes the following issues : Security vulnerabilities addressed : CVE-2019-6109: Fixed an character encoding issue in the progress display of the scp client that could be used to manipulate client output, allowing for spoofing during file transfers (bsc#1121816). CVE-2019-6111: Properly validate object names received by the scp client to prevent arbitrary file overwrites when interacting with a malicious SSH server (bsc#1121821). Other issues fixed: Fixed two race conditions in sshd relating to SIGHUP (bsc#1119183). Returned proper reason for port forwarding failures (bsc#1090671). Fixed a double free() in the KDF CAVS testing tool (bsc#1065237). 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 125988 published 2019-06-18 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/125988 title SUSE SLED12 / SLES12 Security Update : openssh (SUSE-SU-2019:1524-1) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201903-16.NASL description The remote host is affected by the vulnerability described in GLSA-201903-16 (OpenSSH: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in OpenSSH. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could overwrite arbitrary files, transfer malicious files, or gain unauthorized access. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 122990 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/122990 title GLSA-201903-16 : OpenSSH: Multiple vulnerabilities
Redhat
| advisories |
| ||||
| rpms |
|
The Hacker News
| id | THN:445A5A09D3930F981A45FE5AFA1E4CEC |
| last seen | 2019-01-15 |
| modified | 2019-01-15 |
| published | 2019-01-15 |
| reporter | The Hacker News |
| source | https://thehackernews.com/2019/01/scp-software-vulnerabilities.html |
| title | 36-Year-Old SCP Clients' Implementation Flaws Discovered |
References
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
- https://cvsweb.openbsd.org/src/usr.bin/ssh/progressmeter.c
- https://usn.ubuntu.com/3885-1/
- https://www.debian.org/security/2019/dsa-4387
- https://security.netapp.com/advisory/ntap-20190213-0001/
- https://security.gentoo.org/glsa/201903-16
- https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://access.redhat.com/errata/RHSA-2019:3702
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3YVQ2BPTOVDCFDVNC2GGF5P5ISFG37G/