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Gentoo Linux Security Advisory                           GLSA 200409-18
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                                            https://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:

  https://security.gentoo.org/glsa/200409-18

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
https://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.

https://creativecommons.org/licenses/by-sa/1.0/