Severity: Normal
Title: HarfBuzz: Denial of Service
Date: July 10, 2024
Bugs: #905310
ID: 202407-24

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Synopsis
========

A vulnerability has been discovered in HarfBuzz, which can lead to a
denial of service.

Background
==========

HarfBuzz is an OpenType text shaping engine.

Affected packages
=================

Package Vulnerable Unaffected
------------------- ------------ ------------
media-libs/harfbuzz < 7.1.0 >= 7.1.0

Description
===========

Multiple vulnerabilities have been discovered in HarfBuzz. Please review
the CVE identifiers referenced below for details.

Impact
======

hb-ot-layout-gsubgpos.hh in HarfBuzz allows attackers to trigger O(n^2)
growth via consecutive marks during the process of looking back for base
glyphs when attaching marks.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All HarfBuzz users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/harfbuzz-7.1.0"

References
==========

[ 1 ] CVE-2023-22006
https://nvd.nist.gov/vuln/detail/CVE-2023-22006
[ 2 ] CVE-2023-22036
https://nvd.nist.gov/vuln/detail/CVE-2023-22036
[ 3 ] CVE-2023-22041
https://nvd.nist.gov/vuln/detail/CVE-2023-22041
[ 4 ] CVE-2023-22044
https://nvd.nist.gov/vuln/detail/CVE-2023-22044
[ 5 ] CVE-2023-22045
https://nvd.nist.gov/vuln/detail/CVE-2023-22045
[ 6 ] CVE-2023-22049
https://nvd.nist.gov/vuln/detail/CVE-2023-22049
[ 7 ] CVE-2023-25193
https://nvd.nist.gov/vuln/detail/CVE-2023-25193

Availability
============

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

https://security.gentoo.org/glsa/202407-24

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 2024 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