Integer overflow in libx11 - CVE-2020-14344

Vulnerability identifier: #VU41865

CSH Severity: Low

CVSS v4: 5.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-14344

CWE-ID: CWE-190

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow in the X Input Method (XIM) client in libX11. A local user can run a specially crafted program, trigger integer overflow and execute arbitrary code on the system with elevated privileges.

libx11
Gentoo Linux
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Ubuntu
Opensuse
openEuler
Fedora
libx11 (Alpine package)
egl-wayland (Red Hat package)
libglvnd (Red Hat package)
libx11-6 (Ubuntu package)
libwacom (Red Hat package)
libX11 (Red Hat package)
libX11-debuginfo
libX11-debugsource
libX11-help
libX11-devel
libX11
libinput (Red Hat package)
xorg-x11-server (Red Hat package)
libdrm (Red Hat package)
xorg-x11-drivers (Red Hat package)
mesa (Red Hat package)
Cloud Pak for Security (CP4S)
OpenShift Virtualization

Install updates from vendor's website.

libx11 - update to 1.6.10
Cloud Pak for Security (CP4S) - update to 1.8.0.0
egl-wayland (Red Hat package) - update to 1.1.5-3.el8
libglvnd (Red Hat package) - update to 1.3.2-1.el8
libx11-6 (Ubuntu package) - addressed in versions 2:1.4.99.1-0ubuntu2.5, 2:1.6.2-1ubuntu2.1+esm1, 2:1.6.3-1ubuntu2.2, 2:1.6.4-3ubuntu0.3, 2:1.6.9-2ubuntu1.1
libwacom (Red Hat package) - update to 1.6-2.el8
libX11 (Red Hat package) - update to 1.6.8-4.el8
libX11-debuginfo - update to 1.6.9-4
libX11-debugsource - update to 1.6.9-4
libX11-help - update to 1.6.9-4
libX11-devel - update to 1.6.9-4
libX11 - update to 1.6.9-4
libX11 - addressed in versions 1.6.12-1.fc31, 1.6.12-1.fc32, 1.6.12-1.fc33
libinput (Red Hat package) - update to 1.16.3-1.el8
xorg-x11-server (Red Hat package) - update to 1.20.10-1.el8
libdrm (Red Hat package) - update to 2.4.103-1.el8
OpenShift Virtualization - addressed in versions 2.6.6, 4.8.0
xorg-x11-drivers (Red Hat package) - update to 7.7-30.el8
mesa (Red Hat package) - update to 20.3.3-2.el8

• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00014.html
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00015.html
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14344
• https://lists.x.org/archives/xorg-announce/2020-July/003050.html
• https://www.openwall.com/lists/oss-security/2020/07/31/1

• Privilege escalation in libX11 library
• OpenSUSE Linux update for libX11
• OpenSUSE Linux update for libX11
• OpenSUSE Linux update for libX11
• OpenSUSE Linux update for libX11
• Integer overflow in libx11 (Alpine package)
• Gentoo update for X.Org X11 library
• Red Hat Enterprise Linux 8 update for userspace graphics, xorg-x11, and mesa
• Multiple vulnerabilities in IBM Cloud Pak for Security
• openEuler 20.03 LTS update for libX11
• Multiple vulnerabilities in OpenShift Virtualization 4.8
• Multiple vulnerabilities in OpenShift Virtualization 2.6
• Ubuntu update for libx11
• Ubuntu update for libx11
• Fedora 33 update for libX11
• Fedora 32 update for libX11
• Fedora 31 update for libX11