USN-2257-1: Samba vulnerabilities

Ubuntu Security Notice USN-2257-1

26th June, 2014

samba vulnerabilities

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

  • Ubuntu 14.04 LTS
  • Ubuntu 13.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in Samba.

Software description

  • samba - SMB/CIFS file, print, and login server for Unix

Details

Christof Schmitt discovered that Samba incorrectly initialized a certain
response field when vfs shadow copy was enabled. A remote authenticated
attacker could use this issue to possibly obtain sensitive information.
This issue only affected Ubuntu 13.10 and Ubuntu 14.04 LTS. (CVE-2014-0178)

It was discovered that the Samba internal DNS server incorrectly handled QR
fields when processing incoming DNS messages. A remote attacker could use
this issue to cause Samba to consume resources, resulting in a denial of
service. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-0239)

Daniel Berteaud discovered that the Samba NetBIOS name service daemon
incorrectly handled certain malformed packets. A remote attacker could use
this issue to cause Samba to consume resources, resulting in a denial of
service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 13.10, and
Ubuntu 14.04 LTS. (CVE-2014-0244)

Simon Arlott discovered that Samba incorrectly handled certain unicode path
names. A remote authenticated attacker could use this issue to cause Samba
to stop responding, resulting in a denial of service. (CVE-2014-3493)

Update instructions

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

Ubuntu 14.04 LTS:
samba 2:4.1.6+dfsg-1ubuntu2.14.04.2
Ubuntu 13.10:
samba 2:3.6.18-1ubuntu3.3
Ubuntu 12.04 LTS:
samba 2:3.6.3-2ubuntu2.11
Ubuntu 10.04 LTS:
samba 2:3.4.7~dfsg-1ubuntu3.15

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2014-0178, CVE-2014-0239, CVE-2014-0244, CVE-2014-3493