GLSA Bodhisattva
Joined: 25 Feb 2003 Posts: 3829 Location: Essen, Germany
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Posted: Tue Sep 14, 2004 9:34 pm Post subject: [ GLSA 200409-18 ] cdrtools: Local root vulnerability in cdr |
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Gentoo Linux Security Advisory
Title: cdrtools: Local root vulnerability in cdrecord if set SUID root (GLSA 200409-18)
Severity: high
Exploitable: local
Date: September 14, 2004
Bug(s): #63187
ID: 200409-18
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: app-cdr/cdrtools
Vulnerable: <= 2.01_alpha37
Unaffected: >= 2.01_alpha37-r1
Unaffected: >= 2.01_alpha28-r2 < 2.2
Architectures: All supported architectures
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 : Code: | # chmod a-s /usr/bin/cdrecord |
Resolution
All cdrtools users should upgrade to the latest version: Code: | # emerge sync
# emerge -pv ">=app-cdr/cdrtools-2.01_alpha37-r1"
# emerge ">=app-cdr/cdrtools-2.01_alpha37-r1" |
References
CAN-2004-0806
Last edited by GLSA on Sun May 07, 2006 4:52 pm; edited 1 time in total |
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