Ubuntu Security Notice USN-460-1
15th May, 2007
samba vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 7.04
- Ubuntu 6.10
- Ubuntu 6.06 LTS
Details
Paul Griffith and Andrew Hogue discovered that Samba did not fully drop
root privileges while translating SIDs. A remote authenticated user
could issue SMB operations during a small window of opportunity and gain
root privileges. (CVE-2007-2444)
Brian Schafer discovered that Samba did not handle NDR parsing
correctly. A remote attacker could send specially crafted MS-RPC
requests that could overwrite heap memory and execute arbitrary code.
(CVE-2007-2446)
It was discovered that Samba did not correctly escape input parameters
for external scripts defined in smb.conf. Remote authenticated users
could send specially crafted MS-RPC requests and execute arbitrary shell
commands. (CVE-2007-2447)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 7.04:
- samba 3.0.24-2ubuntu1.1
- Ubuntu 6.10:
- samba 3.0.22-1ubuntu4.2
- Ubuntu 6.06 LTS:
- samba 3.0.22-1ubuntu3.3
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.