Joined: 12 May 2004
|Posted: Thu Oct 18, 2007 8:26 pm Post subject: [ GLSA 200710-18 ] util-linux: Local privilege escalation
|Gentoo Linux Security Advisory
Title: util-linux: Local privilege escalation (GLSA 200710-18)
Date: October 18, 2007
The mount and umount programs might allow local attackers to gain root privileges.
util-linux is a suite of Linux programs including mount and umount, programs used to mount and unmount filesystems.
Vulnerable: < 2.12r-r8
Unaffected: >= 2.12r-r8
Architectures: All supported architectures
Ludwig Nussel discovered that the check_special_mountprog() and check_special_umountprog() functions call setuid() and setgid() in the wrong order and do not check the return values, which can lead to privileges being dropped improperly.
A local attacker may be able to exploit this vulnerability by using mount helpers such as the mount.nfs program to gain root privileges and run arbitrary commands.
There is no known workaround at this time.
All util-linux users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/util-linux-2.12r-r8"