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USN-460-1: Samba vulnerabilities

16 May 2007

Samba vulnerabilities

Releases

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
  • samba - 3.0.22-1ubuntu3.3

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