Severity: Normal
Title: QPDF: Buffer Overflow
Date: January 15, 2024
Bugs: #803110
ID: 202401-20

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=======
A vulnerability has been found in QPDF which can lead to a heap-based
buffer overflow.

Background
=========
QPDF: A content-preserving PDF document transformer.

Affected packages
================
Package Vulnerable Unaffected
------------- ------------ ------------
app-text/qpdf < 10.1.0 >= 10.1.0

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

Impact
=====
QPDF has a heap-based buffer overflow in Pl_ASCII85Decoder::write
(called from Pl_AES_PDF::flush and Pl_AES_PDF::finish) when a certain
downstream write fails.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All QPDF users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/qpdf-10.1.0"

References
=========
[ 1 ] CVE-2021-36978
https://nvd.nist.gov/vuln/detail/CVE-2021-36978

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

https://security.gentoo.org/glsa/202401-20

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