USN-2922-1: Samba vulnerabilities

8 March 2016

samba vulnerabilities

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

  • Ubuntu 15.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in Samba.

Software Description

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

Details

Jeremy Allison discovered that Samba incorrectly handled ACLs on symlink paths. A remote attacker could use this issue to overwrite the ownership of ACLs using symlinks. (CVE-2015-7560)

Garming Sam and Douglas Bagnall discovered that the Samba internal DNS server incorrectly handled certain DNS TXT records. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service, or possibly obtain uninitialized memory contents. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2016-0771)

It was discovered that the Samba Web Administration Tool (SWAT) was vulnerable to clickjacking and cross-site request forgery attacks. This issue only affected Ubuntu 12.04 LTS. (CVE-2013-0213, CVE-2013-0214)

Update instructions

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

Ubuntu 15.10
samba - 2:4.1.17+dfsg-4ubuntu3.3
Ubuntu 14.04 LTS
samba - 2:4.1.6+dfsg-1ubuntu2.14.04.13
Ubuntu 12.04 LTS
samba - 2:3.6.3-2ubuntu2.17
swat - 2:3.6.3-2ubuntu2.17

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