Date: Tue, 14 Sep 2004 23:13:11 +0200
From: Sune Kloppenborg Jeppesen <jaervosz@gentoo.org>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200409-18 ] cdrtools: Local root vulnerability in cdrecord if set SUID root
Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com,
security-alerts@linuxsecurity.com
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Gentoo Linux Security Advisory GLSA 200409-18
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http://security.gentoo.org/
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Severity: High
Title: cdrtools: Local root vulnerability in cdrecord if set SUID
root
Date: September 14, 2004
Bugs: #63187
ID: 200409-18
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Synopsis
========
cdrecord, if manually set SUID root, is vulnerable to a local root
exploit allowing users to escalate privileges.
Background
==========
The cdrtools package is a set of tools for CD recording, including the
popular cdrecord command-line utility.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-cdr/cdrtools <= 2.01_alpha37 >= 2.01_alpha37-r1
*>= 2.01_alpha28-r2
Description
===========
Max Vozeler discovered that the cdrecord utility, when set to SUID
root, fails to drop root privileges before executing a user-supplied
RSH program. By default, Gentoo does not ship the cdrecord utility as
SUID root and therefore is not vulnerable. However, many users (and
CD-burning front-ends) set this manually after installation.
Impact
======
A local attacker could specify a malicious program using the $RSH
environment variable and have it executed by the SUID cdrecord,
resulting in root privileges escalation.
Workaround
==========
As a workaround, you could remove the SUID rights from your cdrecord
utility :
# chmod a-s /usr/bin/cdrecord
Resolution
==========
All cdrtools users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=app-cdr/cdrtools-2.01_alpha37-r1"
# emerge ">=app-cdr/cdrtools-2.01_alpha37-r1"
References
==========
[ 1 ] CAN-2004-0806
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0806
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200409-18.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 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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