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Gentoo Linux Security Advisory 201709-19

Gentoo Linux Security Advisory 201709-19
Posted Sep 25, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201709-19 - A vulnerability in Exim may allow local users to gain root privileges. Versions less than 4.89-r1 are affected.

tags | advisory, local, root
systems | linux, gentoo
advisories | CVE-2017-1000369
MD5 | c4cda9020eacdc18314d460e10c57921

Gentoo Linux Security Advisory 201709-19

Change Mirror Download
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Gentoo Linux Security Advisory GLSA 201709-19
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https://security.gentoo.org/
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Severity: Normal
Title: Exim: Local privilege escalation
Date: September 24, 2017
Bugs: #622212
ID: 201709-19

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Synopsis
========

A vulnerability in Exim may allow local users to gain root privileges.

Background
==========

Exim is a message transfer agent (MTA) developed at the University of
Cambridge for use on Unix systems connected to the Internet.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mail-mta/exim < 4.89-r1 >= 4.89-r1

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

Exim supports the use of multiple "-p" command line arguments causing a
memory leak. This could lead to a stack-clash in user-space and as
result the attacker can, "clash" or "smash" the stack or another memory
region, or "jump" over the stack guard-page.

Impact
======

A local attacker could obtain root privileges.

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-4.89-r1"

References
==========

[ 1 ] CVE-2017-1000369
https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-1000369

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

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

https://security.gentoo.org/glsa/201709-19

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 2017 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.

http://creativecommons.org/licenses/by-sa/2.5

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