cdrecord, if manually set SUID root, is vulnerable to a local root exploit allowing users to escalate privileges.
|Package||app-cdr/cdrtools on all architectures|
|Affected versions||<= 2.01_alpha37|
|Unaffected versions||>= 2.01_alpha37-r1, revision >= 2.01_alpha28-r2|
The cdrtools package is a set of tools for CD recording, including the popular cdrecord command-line utility.
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.
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.
As a workaround, you could remove the SUID rights from your cdrecord utility :
# chmod a-s /usr/bin/cdrecord
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"
September 14, 2004
September 14, 2004: 01