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Gentoo Linux Security Advisory
GLSA 200710-18
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g/
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Severity: High
Title: util-linux: Local privilege escalation
Date: October 18, 2007
Bugs: #195390
ID: 200710-18
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Synopsis
========
The mount and umount programs might allow local attackers to
gain root
privileges.
Background
==========
util-linux is a suite of Linux programs including mount and
umount,
programs used to mount and unmount filesystems.
Affected packages
=================
------------------------------------------------------------
-------
Package / Vulnerable /
Unaffected
------------------------------------------------------------
-------
1 sys-apps/util-linux < 2.12r-r8
>= 2.12r-r8
Description
===========
Ludwig Nussel discovered that the check_special_mountprog()
and
check_special_umountprog() functions call setuid() and
setgid() in the
wrong order and do not check the return values, which can
lead to
privileges being dropped improperly.
Impact
======
A local attacker may be able to exploit this vulnerability
by using
mount helpers such as the mount.nfs program to gain root
privileges and
run arbitrary commands.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All util-linux users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose
">=sys-apps/util-linux-2.12r-r8"
References
==========
[ 1 ] CVE-2007-5191
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-200
7-5191
Availability
============
This GLSA and any updates to it are available for viewing
at
the Gentoo Security Website:
ht
tp://security.gentoo.org/glsa/glsa-200710-18.xml
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
http://bugs.gentoo.org.
License
=======
Copyright 2007 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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