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Gentoo Linux Security Advisory                           GLSA 202401-18
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                                           https://security.gentoo.org/
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 Severity: High
    Title: zlib: Buffer Overflow
     Date: January 15, 2024
     Bugs: #916484
       ID: 202401-18

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Synopsis
========

A vulnerability has been found in zlib that can lead to a heap-based
buffer overflow.

Background
==========

zlib is a widely used free and patent unencumbered data compression
library.

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

Package        Vulnerable    Unaffected
-------------  ------------  ------------
sys-libs/zlib  < 1.2.13-r2   >= 1.2.13-r2

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

A vulnerability has been discovered in zlib. Please review the CVE
identifier referenced below for details.

Impact
======

MiniZip in zlib through 1.3 has an integer overflow and resultant heap-
based buffer overflow in ZipOpenNewFileInZip4_64 via a long filename,
comment, or extra field.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All zlib users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-libs/zlib-1.2.13-r2"

References
==========

[ 1 ] CVE-2023-45853
      https://nvd.nist.gov/vuln/detail/CVE-2023-45853

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

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

 https://security.gentoo.org/glsa/202401-18

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 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/