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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