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Sicherheit: Unsichere Verwendung temporärer Dateien in am-utils
Aktuelle Meldungen Distributionen
Name: Unsichere Verwendung temporärer Dateien in am-utils
ID: 200804-09
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Do, 10. April 2008, 22:42
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1078
Applikationen: am-utils

Originalnachricht

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Gentoo Linux Security Advisory GLSA 200804-09
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http://security.gentoo.org/
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Severity: Normal
Title: am-utils: Insecure temporary file creation
Date: April 10, 2008
Bugs: #210158
ID: 200804-09

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Synopsis
========

am-utils creates temporary files insecurely allowing local users to
overwrite arbitrary files via a symlink attack.

Background
==========

am-utils is a collection of utilities for use with the Berkeley
Automounter.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-fs/am-utils < 6.1.5 >= 6.1.5

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

Tavis Ormandy discovered that, when creating temporary files, the
'expn' utility does not check whether the file already exists.

Impact
======

A local attacker could exploit the vulnerability via a symlink attack
to overwrite arbitrary files.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All am-utils users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/am-utils-6.1.5"

References
==========

[ 1 ] CVE-2008-1078
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1078

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

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

http://security.gentoo.org/glsa/glsa-200804-09.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 2008 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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