cdrtools: Local root vulnerability in cdrecord if set SUID root

cdrtools: Local root vulnerability in cdrecord if set SUID root cdrecord, if manually set SUID root, is vulnerable to a local root exploit allowing users to escalate privileges. cdrtools September 14, 2004 September 14, 2004: 01 63187 local 2.01_alpha37-r1 2.01_alpha28-r2 2.01_alpha37

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"

CAN-2004-0806 jaervosz koon jaervosz