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Sicherheit: Unsichere Verwendung temporärer Dateien in portage
Aktuelle Meldungen Distributionen
Name: Unsichere Verwendung temporärer Dateien in portage
ID: 200411-13:01
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Mo, 8. November 2004, 12:00
Referenzen: Keine Angabe

Originalnachricht

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Gentoo Linux Security Advisory GLSA 200411-13:01
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http://security.gentoo.org/
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Severity: Normal
Title: Portage, Gentoolkit: Temporary file vulnerabilities
Date: November 07, 2004
Bugs: #68846, #69147
ID: 200411-13:01

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Synopsis
========

dispatch-conf (included in Portage) and qpkg (included in Gentoolkit)
are vulnerable to symlink attacks, potentially allowing a local user
to overwrite arbitrary files with the rights of the user running the
script.

Background
==========

Portage is Gentoo's package management tool. The dispatch-conf utility
allows for easy rollback of configuration file changes and automatic
updates of configurations files never modified by users. Gentoolkit is
a collection of Gentoo specific administration scripts, one of which is
the portage querying tool qpkg.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/portage <= 2.0.51-r2 >= 2.0.51-r3
2 app-portage/gentoolkit <= 0.2.0_pre10 >= 0.2.0_pre10-r1
*>= 0.2.0_pre8-r1
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

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

dispatch-conf and qpkg use predictable filenames for temporary files.

Impact
======

A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When
an affected script is called, this would result in the file to be
overwritten with the rights of the user running the dispatch-conf or
qpkg, which could be the root user.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Portage users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=sys-apps/portage-2.0.51-r3"

All Gentoolkit users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=app-portage/gentoolkit-0.2.0_pre8-r1"

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

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

http://security.gentoo.org/glsa/glsa-200411-13.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 2004 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/1.0
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