A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to expire, at which time they would gain access to the logged-in user's session.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - gdm: lock screen bypass when timed login is enabled (CVE-2019-3825)

  - gdm: inability to timely contact accountservice via dbus leads gnome-initial-setup to creation of account     with admin privileges (CVE-2020-16125)

  - A flaw was found in GDM in versions prior to 3.38.2.1. A race condition in the handling of session     shutdown makes it possible to bypass the lock screen for a user that has autologin enabled, accessing     their session without authentication. This is similar to CVE-2017-12164, but requires more difficult     conditions to exploit. (CVE-2020-27837)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2020:1766 advisory.

  - There is a stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp in LibRaw     0.19.1. Crafted input will lead to a denial of service or possibly unspecified other impact.
    (CVE-2018-20337)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles file     ownership because setfsuid is not used. (CVE-2019-12447)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c has race conditions     because the admin backend doesn't implement query_info_on_read/write. (CVE-2019-12448)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles a file's     user and group ownership during move (and copy with G_FILE_COPY_ALL_METADATA) operations from admin:// to     file:// URIs, because root privileges are unavailable. (CVE-2019-12449)

  - A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an     attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to     expire, at which time they would gain access to the logged-in user's session. (CVE-2019-3825)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2020:1766 advisory.

  - There is a stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp in LibRaw     0.19.1. Crafted input will lead to a denial of service or possibly unspecified other impact.
    (CVE-2018-20337)

  - A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an     attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to     expire, at which time they would gain access to the logged-in user's session. (CVE-2019-3825)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles file     ownership because setfsuid is not used. (CVE-2019-12447)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c has race conditions     because the admin backend doesn't implement query_info_on_read/write. (CVE-2019-12448)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles a file's     user and group ownership during move (and copy with G_FILE_COPY_ALL_METADATA) operations from admin:// to     file:// URIs, because root privileges are unavailable. (CVE-2019-12449)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the gdm package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A vulnerability was discovered in gdm before 3.31.4.
    When timed login is enabled in configuration, an     attacker could bypass the lock screen by selecting the     timed login user and waiting for the timer to expire,     at which time they would gain access to the logged-in     user's session.(CVE-2019-3825)

  - The daemon in GDM through 3.29.1 does not properly     unexport display objects from its D-Bus interface when     they are destroyed, which allows a local attacker to     trigger a use-after-free via a specially crafted     sequence of D-Bus method calls, resulting in a denial     of service or potential code execution.(CVE-2018-14424)

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.

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:1766 advisory.

  - LibRaw: stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp (CVE-2018-20337)

  - gvfs: mishandling of file ownership in daemon/gvfsbackendadmin.c (CVE-2019-12447)

  - gvfs: race condition in daemon/gvfsbackendadmin.c due to admin backend not implementing     query_info_on_read/write (CVE-2019-12448)

  - gvfs: mishandling of file's user and group ownership in daemon/gvfsbackendadmin.c due to unavailability of     root privileges (CVE-2019-12449)

  - gdm: lock screen bypass when timed login is enabled (CVE-2019-3825)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the gdm package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The daemon in GDM through 3.29.1 does not properly     unexport display objects from its D-Bus interface when     they are destroyed, which allows a local attacker to     trigger a use-after-free via a specially crafted     sequence of D-Bus method calls, resulting in a denial     of service or potential code execution.(CVE-2018-14424)

  - A vulnerability was discovered in gdm before 3.31.4.
    When timed login is enabled in configuration, an     attacker could bypass the lock screen by selecting the     timed login user and waiting for the timer to expire,     at which time they would gain access to the logged-in     user's session.(CVE-2019-3825)

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.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-1766 advisory.

  - There is a stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp in LibRaw     0.19.1. Crafted input will lead to a denial of service or possibly unspecified other impact.
    (CVE-2018-20337)

  - A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an     attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to     expire, at which time they would gain access to the logged-in user's session. (CVE-2019-3825)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles file     ownership because setfsuid is not used. (CVE-2019-12447)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c has race conditions     because the admin backend doesn't implement query_info_on_read/write. (CVE-2019-12448)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles a file's     user and group ownership during move (and copy with G_FILE_COPY_ALL_METADATA) operations from admin:// to     file:// URIs, because root privileges are unavailable. (CVE-2019-12449)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1766 advisory.

  - LibRaw: stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp (CVE-2018-20337)

  - gvfs: mishandling of file ownership in daemon/gvfsbackendadmin.c (CVE-2019-12447)

  - gvfs: race condition in daemon/gvfsbackendadmin.c due to admin backend not implementing     query_info_on_read/write (CVE-2019-12448)

  - gvfs: mishandling of file's user and group ownership in daemon/gvfsbackendadmin.c due to unavailability of     root privileges (CVE-2019-12449)

  - gdm: lock screen bypass when timed login is enabled (CVE-2019-3825)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for gdm fixes the following issues :

Security issue fixed :

  - CVE-2019-3825: Fixed a lock screen bypass when timed     login was enabled (bsc#1124628).

Other issues fixed :

  - GLX applications do not work well when the proprietary     nvidia driver is used with a wayland session. Because of     that this update disables wayland on that hardware     (bsc#1112578).

  - Fixed an issue where gdm restart fails to kill user     processes (bsc#1112294 and bsc#1113245).

  - Fixed a System halt in the screen with message 'End of     ORACLE section' (bsc#1120307).

  - Fixed an issue which did not allow the returning to text     console when gdm is stopped (bsc#1113700).&#9;

  - Fixed an issue which was causing system hang during the     load of gdm (bsc#1112578).

This update was imported from the SUSE:SLE-15:Update update project.

This update for gdm fixes the following issues :

Security issue fixed :

CVE-2019-3825: Fixed a lock screen bypass when timed login was enabled (bsc#1124628).

Other issues fixed: GLX applications do not work well when the proprietary nvidia driver is used with a wayland session. Because of that this update disables wayland on that hardware (bsc#1112578).

Fixed an issue where gdm restart fails to kill user processes (bsc#1112294 and bsc#1113245).

Fixed a System halt in the screen with message 'End of ORACLE section' (bsc#1120307).

Fixed an issue which did not allow the returning to text console when gdm is stopped (bsc#1113700).

Fixed an issue which was causing system hang during the load of gdm (bsc#1112578).

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.

gdm 3.30.3 release.

  - Screen lock bypass fix (when timed login is enabled)     (CVE-2019-3825)

  - Translation updates

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.

Burghard Britzke discovered that GDM incorrectly handled certain configurations. An attacker could possibly use this issue to get unauthorized access to a different user.

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.

ID	Name	Product	Family	Severity
195458	RHEL 6 : gdm (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
184678	Rocky Linux 8 : GNOME (RLSA-2020:1766)	Nessus	Rocky Linux Local Security Checks	high
157605	AlmaLinux 8 : GNOME (ALSA-2020:1766)	Nessus	Alma Linux Local Security Checks	high
149178	EulerOS 2.0 SP3 : gdm (EulerOS-SA-2021-1787)	Nessus	Huawei Local Security Checks	high
146754	EulerOS 2.0 SP2 : gdm (EulerOS-SA-2021-1297)	Nessus	Huawei Local Security Checks	high
145863	CentOS 8 : GNOME (CESA-2020:1766)	Nessus	CentOS Local Security Checks	high
144224	EulerOS 2.0 SP5 : gdm (EulerOS-SA-2020-2546)	Nessus	Huawei Local Security Checks	high
140034	Oracle Linux 8 : GNOME (ELSA-2020-1766)	Nessus	Oracle Linux Local Security Checks	high
136113	RHEL 8 : GNOME (RHSA-2020:1766)	Nessus	Red Hat Local Security Checks	high
122746	openSUSE Security Update : gdm (openSUSE-2019-310)	Nessus	SuSE Local Security Checks	medium
122581	SUSE SLED15 / SLES15 Security Update : gdm (SUSE-SU-2019:0527-1)	Nessus	SuSE Local Security Checks	medium
122566	Fedora 29 : 1:gdm (2019-caab5920f2)	Nessus	Fedora Local Security Checks	medium
122362	Ubuntu 18.04 LTS : GDM vulnerability (USN-3892-1)	Nessus	Ubuntu Local Security Checks	medium

Detections

Analytics

CVE-2019-3825

medium

Tenable Plugins

medium

high

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medium

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