USN-893-1: Samba vulnerability

28 January 2010

samba vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.10
  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software Description

  • samba


Ronald Volgers discovered that the mount.cifs utility, when installed as a setuid program, suffered from a race condition when verifying user permissions. A local attacker could trick samba into mounting over arbitrary locations, leading to a root privilege escalation.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.10
smbfs - 2:3.4.0-3ubuntu5.4
Ubuntu 9.04
smbfs - 2:3.3.2-1ubuntu3.3
Ubuntu 8.10
smbfs - 2:3.2.3-1ubuntu3.7
Ubuntu 8.04 LTS
smbfs - 3.0.28a-1ubuntu4.10
Ubuntu 6.06 LTS
smbfs - 3.0.22-1ubuntu3.10

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.