6.8 - USN-952-1

A security issue affects the following Ubuntu releases:

Ubuntu 6.06 LTS Ubuntu 8.04 LTS Ubuntu 9.04 Ubuntu 9.10 Ubuntu 10.04 LTS

This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.

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

Ubuntu 6.06 LTS:
cupsys 1.2.2-0ubuntu0.6.06.19

Ubuntu 8.04 LTS:
cupsys 1.3.7-1ubuntu3.11

Ubuntu 9.04:
cups 1.3.9-17ubuntu3.9

Ubuntu 9.10:
cups 1.4.1-5ubuntu2.6

Ubuntu 10.04 LTS:
cups 1.4.3-1ubuntu1.2

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

Details follow:

Adrian Pastor and Tim Starling discovered that the CUPS web interface incorrectly protected against cross-site request forgery (CSRF) attacks. If an authenticated user were tricked into visiting a malicious website while logged into CUPS, a remote attacker could modify the CUPS configuration and possibly steal confidential data. (CVE-2010-0540)

It was discovered that CUPS did not properly handle memory allocations in the texttops filter. If a user or automated system were tricked into printing a crafted text file, a remote attacker could cause a denial of service or possibly execute arbitrary code with privileges of the CUPS user (lp). (CVE-2010-0542)

Luca Carettoni discovered that the CUPS web interface incorrectly handled form variables. A remote attacker who had access to the CUPS web interface could use this flaw to read a limited amount of memory from the cupsd process and possibly obtain confidential data. (CVE-2010-1748)