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Gentoo Linux Security Advisory GLSA 201906-01
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https://security.gentoo.org/
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Severity: High
Title: Exim: Remote command execution
Date: June 06, 2019
Bugs: #687336
ID: 201906-01

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Synopsis
========

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

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 >= 4.92

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

A vulnerability was discovered in how Exim validates recipient
addresses in the deliver_message() function.

Impact
======

A remote attacker could execute arbitrary commands by sending an email
with a specially crafted recipient address to the affected system.

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”

References
==========

[ 1 ] CVE-2019-10149
https://nvd.nist.gov/vuln/detail/CVE-2019-10149

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

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

https://security.gentoo.org/glsa/201906-01

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 2019 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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