Ubuntu Security Notice USN-893-1
28th 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
Details
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 version:
- 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: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.