An Exim security update has been released for Gentoo Linux.

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Gentoo Linux Security Advisory GLSA 202003-47
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  https://security.gentoo.org/
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Severity: High
Title: Exim: Heap-based buffer overflow
Date: March 20, 2020
Bugs: #701282
ID: 202003-47

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Synopsis
========

A vulnerability in Exim could allow a remote attacker to execute
arbitrary code.

Background
==========

Exim is a message transfer agent (MTA) designed to be a a highly
configurable, drop-in replacement for sendmail.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mail-mta/exim < 4.92.3 >= 4.92.3

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

It was discovered that Exim incorrectly handled certain string
operations.

Impact
======

A remote attacker, able to connect to a vulnerable Exim instance, could
possibly execute arbitrary code with the privileges of the process or
cause a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Exim users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/exim-4.92.3"

References
==========

[ 1 ] CVE-2019-16928
  https://nvd.nist.gov/vuln/detail/CVE-2019-16928

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

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

  https://security.gentoo.org/glsa/202003-47

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