USN-617-1: Samba vulnerabilities

Ubuntu Security Notice USN-617-1

17th June, 2008

samba vulnerabilities

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

  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 7.04
  • Ubuntu 6.06 LTS

Software description

  • samba

Details

Samba developers discovered that nmbd could be made to overrun
a buffer during the processing of GETDC logon server requests.
When samba is configured as a Primary or Backup Domain Controller,
a remote attacker could send malicious logon requests and possibly
cause a denial of service. (CVE-2007-4572)

Alin Rad Pop of Secunia Research discovered that Samba did not
properly perform bounds checking when parsing SMB replies. A remote
attacker could send crafted SMB packets and execute arbitrary code.
(CVE-2008-1105)

Update instructions

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

Ubuntu 8.04 LTS:
libsmbclient 3.0.28a-1ubuntu4.2
samba 3.0.28a-1ubuntu4.2
Ubuntu 7.10:
libsmbclient 3.0.26a-1ubuntu2.4
samba 3.0.26a-1ubuntu2.4
Ubuntu 7.04:
libsmbclient 3.0.24-2ubuntu1.6
samba 3.0.24-2ubuntu1.6
Ubuntu 6.06 LTS:
libsmbclient 3.0.22-1ubuntu3.7
samba 3.0.22-1ubuntu3.7

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

CVE-2007-4572, CVE-2008-1105