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Ubuntu Security Notice USN-906-1 March 03, 2010
cups, cupsys vulnerabilities
CVE-2009-3553, CVE-2010-0302, CVE-2010-0393
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A security issue affects the following Ubuntu releases:

Ubuntu 6.06 LTS
Ubuntu 8.04 LTS
Ubuntu 8.10
Ubuntu 9.04
Ubuntu 9.10

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 1.2.2-0ubuntu0.6.06.17
cupsys-client 1.2.2-0ubuntu0.6.06.17

Ubuntu 8.04 LTS:
cupsys 1.3.7-1ubuntu3.8
cupsys-client 1.3.7-1ubuntu3.8

Ubuntu 8.10:
cups 1.3.9-2ubuntu9.5
cups-client 1.3.9-2ubuntu9.5

Ubuntu 9.04:
cups 1.3.9-17ubuntu3.6
cups-client 1.3.9-17ubuntu3.6

Ubuntu 9.10:
cups 1.4.1-5ubuntu2.4
cups-client 1.4.1-5ubuntu2.4

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

Details follow:

It was discovered that the CUPS scheduler did not properly handle certain
network operations. A remote attacker could exploit this flaw and cause the
CUPS server to crash, resulting in a denial of service. This issue only
affected Ubuntu 8.04 LTS, 8.10, 9.04 and 9.10. (CVE-2009-3553,
CVE-2010-0302)

Ronald Volgers discovered that the CUPS lppasswd tool could be made to load
localized message strings from arbitrary files by setting an environment
variable. A local attacker could exploit this with a format-string
vulnerability leading to a root privilege escalation. The default compiler
options for Ubuntu 8.10, 9.04 and 9.10 should reduce this vulnerability to
a denial of service. (CVE-2010-0393)