GLSA 202105-16: X.Org X11 library: Denial of service

http://security.gentoo.org/

Severity:	low
Title:	X.Org X11 library: Denial of service
Date:	05/26/2021
Bugs:	#790824
ID:	202105-16

Synopsis

A vulnerability in X.Org X11 library could lead to a Denial of Service condition.

Background

X.Org is an implementation of the X Window System. The X.Org X11 library provides the X11 protocol library files.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
x11-libs/libX11	< 1.7.1	>= 1.7.1	All supported architectures

Description

It was discovered that XLookupColor() and other X.Org X11 library functions lacked proper validation of the length of their string parameters.

Impact

An attacker could emit arbitrary X protocol requests to the X server through malicious crafted string parameters in applications linked against X.Org X11 library.

Workaround

There is no known workaround at this time.

Resolution

All X.Org X11 library users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=x11-libs/libX11-1.7.1"

References

CVE-2021-31535

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202105-16.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.