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Gentoo Linux Security Advisory GLSA 200504-12
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http://security.gentoo.org/
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Severity: High
Title: rsnapsh Local privilege escalation
Date: April 13, 2005
Bugs: #88681
ID: 200504-12

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Synopsis
========

rsnapshot allow a local user to take ownership of local files,
resulting in privilege escalation.

Background
==========

rsnapshot is a filesystem snapshot utility based on rsync, allowing
local and remote systems backups.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/rsnapshot < 1.2.1 >= 1.2.1

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

The copy_symlink() subroutine in rsnapshot follows symlinks when
changing file ownership, instead of changing the ownership of the
symlink itself.

Impact
======

Under certain circumstances, local attackers can exploit this
vulnerability to take ownership of arbitrary files, resulting in local
privilege escalation.

Workaround
==========

The copy_symlink() subroutine is not called if the cmd_cp parameter has
been enabled.

Resolution
==========

All rsnapshot users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/rsnapshot-1.2.1"

References
==========

[ 1 ] rsnapshot Security Advisory 001
http://www.rsnapshot.org/security/2005/001.html

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

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

http://security.gentoo.org/glsa/glsa-200504-12.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 2005 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/2.0


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