[ GLSA 202208-13 ] libass: Denial of service

[email protected] Wed, 10 Aug 2022 04:08:43 -0000
Newsgroups	gmane.linux.gentoo.announce
Message-ID	<166010452377.7.13757380880052200040@fa4d926cc35c>
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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
[email protected] 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
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