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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/