Home / mailings [gentoo-announce] [ GLSA 201709-19 ] Exim: Local privilege escalation
Posted on 24 September 2017
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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
=================
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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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