Exploit/Advisories

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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

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