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Gentoo Linux Security Advisory GLSA 202011-02
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https://security.gentoo.org/
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Severity: Normal
Title: OpenDMARC: Heap-based buffer overflow
Date: November 03, 2020
Bugs: #734158
ID: 202011-02

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Synopsis
========

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

Background
==========

OpenDMARC is an open source DMARC implementation.

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 mail-filter/opendmarc < 1.3.3 >= 1.3.3

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

It was found that OpenDMARC did not properly handle DMARC aggregate
reports.

Impact
======

A remote attacker, by sending a specially crafted DMARC aggregate
report, could possibly cause a Denial of Service condition and
depending on how OpenDMARC library is used in linked application
execute arbitrary code with the privileges of the process.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenDMARC users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=mail-filter/opendmarc-1.3.3”

References
==========

[ 1 ] CVE-2020-12460
https://nvd.nist.gov/vuln/detail/CVE-2020-12460

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

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

https://security.gentoo.org/glsa/202011-02

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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