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Gentoo Linux Security Advisory GLSA 202003-44
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https://security.gentoo.org/
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Severity: High
Title: Binary diff: Heap-based buffer overflow
Date: March 19, 2020
Bugs: #701848
ID: 202003-44

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Synopsis
========

A heap-based buffer overflow in Binary diff might allow remote
attackers to execute arbitrary code.

Background
==========

bsdiff and bspatch are tools for building and applying patches to
binary files.

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 dev-util/bsdiff < 4.3-r4 >= 4.3-r4

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

It was discovered that the implementation of bspatch did not check for
a negative value on numbers of bytes read from the diff and extra
streams.

Impact
======

A remote attacker could entice a user to apply a specially crafted
patch using bspatch, possibly resulting in execution of arbitrary code
with the privileges of the process or a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Binary diff users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=dev-util/bsdiff-4.3-r4”

References
==========

[ 1 ] CVE-2014-9862
https://nvd.nist.gov/vuln/detail/CVE-2014-9862

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

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

https://security.gentoo.org/glsa/202003-44

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 2020 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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