Ubuntu Update for Linux kernel vulnerabilities USN-1571-1

Please Install the Updated Packages.

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.

isc-dhcp on Ubuntu 12.04 LTS , Ubuntu 11.10 , Ubuntu 11.04 , Ubuntu 10.04 LTS

• https://lists.ubuntu.com/archives/ubuntu-security-announce/2012-September/001828.html

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Updated on 2015-03-25