GLSA 202012-12: libass: User-assisted execution of arbitrary code

http://security.gentoo.org/

Severity:	normal
Title:	libass: User-assisted execution of arbitrary code
Date:	12/23/2020
Bugs:	#746413
ID:	202012-12

Synopsis

A vulnerability has been found in libass that could allow a remote attacker to execute arbitrary code.

Background

libass is a portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
media-libs/libass	< 0.15.0	>= 0.15.0	All supported architectures

Description

It was discovered that libass did not properly handle Advanced Substation Alpha/Substation Alpha subtitle format files.

Impact

A remote attacker could entice a user to process an a specially crafted subtitle format file using an application linked against libass, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All libass users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=media-libs/libass-0.15.0"

References

CVE-2020-26682

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202012-12.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.