X.org X11 Server up to 1.20.8 XkbSetNames memory corruption

Summaryinfo

A vulnerability classified as critical has been found in X.org X11 Server up to 1.20.8. This affects the function XkbSetNames. This manipulation causes memory corruption. This vulnerability is handled as CVE-2020-14345. It is possible to launch the attack on the local host. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in X.org X11 Server up to 1.20.8 (Windowing System Software). It has been declared as critical. Affected by this vulnerability is the function XkbSetNames. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in X.Org Server before xorg-x11-server 1.20.9. An Out-Of-Bounds access in XkbSetNames function may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

The weakness was released 09/15/2020 as Bug 1862241 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2020-14345 since 06/17/2020. Attacking locally is a requirement. Required for exploitation is a single authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 236625 (Alibaba Cloud Linux 3 : 0114: userspace graphics, xorg-x11, and mesa (ALINUX3-SA-2022:0114)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.20.9 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236625). Entries connected to this vulnerability are available at VDB-161254, VDB-161253 and VDB-161252. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Windowing System Software

Vendor

• X.org

Name

• X11 Server

Version

• 1.20.0
• 1.20.1
• 1.20.2
• 1.20.3
• 1.20.4
• 1.20.5
• 1.20.6
• 1.20.7
• 1.20.8

License

• open-source

Website

• Vendor: https://www.x.org/

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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