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Gentoo Linux Security Advisory                           GLSA 202208-13
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                                           https://security.gentoo.org/
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 Severity: Low
    Title: libass: Denial of service
     Date: August 10, 2022
     Bugs: #803119
       ID: 202208-13

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Synopsis
=======
A vulnerability in libass could result in denial of service.

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

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-libs/libass          < 0.15.1                    >= 0.15.1

Description
==========
A one-byte buffer overwrite in ASS font decoding could trigger an
assertion failure resulting in denial of service.

Impact
=====
An attacker with control over the ASS track input to libass via an application using it could trigger a denial of service.

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-0.15.1"

References
=========
[ 1 ] CVE-2020-36430
      https://nvd.nist.gov/vuln/detail/CVE-2020-36430

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202208-13

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.

License
======
Copyright 2022 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5