Ubuntu Security Notice (C) 2012-2013 Canonical, Inc. / NASL script (C) 2012-2013 Tenable Network Security, Inc.
The remote Ubuntu host is missing one or more security-related patches.
Glen Eustace discovered that the DHCP server incorrectly handled IPv6
expiration times. A remote attacker could use this issue to cause DHCP
to crash, resulting in a denial of service. This issue only affected
Ubuntu 11.04, Ubuntu 11.10 and Ubuntu 12.04 LTS. (CVE-2012-3955)
Dan Rosenberg discovered that the DHCP AppArmor profile could be
escaped by using environment variables. This update mitigates the
issue by sanitizing certain variables in the DHCP shell scripts.
Update the affected packages.
Risk factor :
High / CVSS Base Score : 7.1
CVSS Temporal Score : 5.3
Public Exploit Available : false