USN-460-1: Samba vulnerabilities

16 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

Software Description

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 versions:

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.

References