CVE-2020-14363

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.

Mesa provides a 3D graphics API that is compatible with Open Graphics Library (OpenGL). It also provides hardware-accelerated drivers for many popular graphics chips.

The following packages have been upgraded to a later upstream version: egl-wayland (1.1.5), libdrm (2.4.103), libglvnd (1.3.2), libinput (1.16.3), libwacom (1.6), mesa (20.3.3), xorg-x11-server (1.20.10). (BZ#1878160, BZ#1886648, BZ#1887654, BZ#1887655)

Security Fix(es):

• xorg-x11-server: Out-of-bounds access in XkbSetNames function (CVE-2020-14345)

• xorg-x11-server: Integer underflow in the X input extension protocol (CVE-2020-14346)

• xorg-x11-server: Out-of-bounds access in XkbSetMap function (CVE-2020-14360)

• xorg-x11-server: XkbSelectEvents integer underflow privilege escalation vulnerability (CVE-2020-14361)

• xorg-x11-server: XRecordRegisterClients integer underflow privilege escalation vulnerability (CVE-2020-14362)

• libX11: Integer overflow leads to double free in locale handling (CVE-2020-14363)

• xorg-x11-server: XkbSetDeviceInfo heap-based buffer overflow privilege escalation vulnerability (CVE-2020-25712)

• libX11: Heap overflow in the X input method client (CVE-2020-14344)

• xorg-x11-server: Leak of uninitialized heap memory from the X server to clients in AllocatePixmap of dix/pixmap.c (CVE-2020-14347)

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 Rocky Linux 8.4 Release Notes linked from the References section.

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.

Mesa provides a 3D graphics API that is compatible with Open Graphics Library (OpenGL). It also provides hardware-accelerated drivers for many popular graphics chips.

The following packages have been upgraded to a later upstream version: egl-wayland (1.1.5), libdrm (2.4.103), libglvnd (1.3.2), libinput (1.16.3), libwacom (1.6), mesa (20.3.3), xorg-x11-server (1.20.10). (BZ#1878160, BZ#1886648, BZ#1887654, BZ#1887655)

Security Fix(es):

• xorg-x11-server: Out-of-bounds access in XkbSetNames function (CVE-2020-14345)

• xorg-x11-server: Integer underflow in the X input extension protocol (CVE-2020-14346)

• xorg-x11-server: Out-of-bounds access in XkbSetMap function (CVE-2020-14360)

• xorg-x11-server: XkbSelectEvents integer underflow privilege escalation vulnerability (CVE-2020-14361)

• xorg-x11-server: XRecordRegisterClients integer underflow privilege escalation vulnerability (CVE-2020-14362)

• libX11: Integer overflow leads to double free in locale handling (CVE-2020-14363)

• xorg-x11-server: XkbSetDeviceInfo heap-based buffer overflow privilege escalation vulnerability (CVE-2020-25712)

• libX11: Heap overflow in the X input method client (CVE-2020-14344)

• xorg-x11-server: Leak of uninitialized heap memory from the X server to clients in AllocatePixmap of dix/pixmap.c (CVE-2020-14347)

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 AlmaLinux Release Notes linked from the References section.

There is an integer overflow and a double free vulnerability in the way LibX11 handles locales. The integer overflow is a necessary precursor to the double free (CVE-2020-14363).

This update for libX11 fixes the following issues:

• CVE-2020-14363: Fix an integer overflow in init_om() (bsc#1175239).

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

This update for libX11 fixes the following issues:

• CVE-2020-14363: Fix an integer overflow in init_om() (bsc#1175239).

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

These are all security issues fixed in the libX11-6-1.7.2-1.2 package on the GA media of openSUSE Tumbleweed.

This update for libX11 fixes the following issues:

• CVE-2020-14363: Fix an integer overflow in init_om() (bsc#1175239).

This update for libX11 fixes the following issues:

• CVE-2020-14363: Fix an integer overflow in init_om() (bsc#1175239).

This update for libX11 fixes the following issues:

• CVE-2020-14363: Fix an integer overflow in init_om() (bsc#1175239).

This update for libX11 fixes the following issues:

• CVE-2020-14363: Fix an integer overflow in init_om() (bsc#1175239).

Todd Carson discovered that libx11 incorrectly handled certain memory operations. A local attacker could possibly use this issue to escalate privileges. (CVE-2020-14344)

Jayden Rivers discovered that libx11 incorrectly handled locales. A local attacker could possibly use this issue to escalate privileges. (CVE-2020-14363)

USN-4487-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.

Original advisory details:

Todd Carson discovered that libx11 incorrectly handled certain memory operations. A local attacker could possibly use this issue to escalate privileges. (CVE-2020-14344)

Jayden Rivers discovered that libx11 incorrectly handled locales. A local attacker could possibly use this issue to escalate privileges. (CVE-2020-14363)