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Ubuntu alert USN-1386-1 (linux-lts-backport-natty)

From:  John Johansen <>
Subject:  [USN-1386-1] Linux kernel (Natty backport) vulnerabilities
Date:  Tue, 06 Mar 2012 10:13:48 -0800
Message-ID:  <>
Archive-link:  Article, Thread

========================================================================== Ubuntu Security Notice USN-1386-1 March 06, 2012 linux-lts-backport-natty vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 10.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux-lts-backport-natty: Linux kernel backport from Natty Details: The linux kernel did not properly account for PTE pages when deciding which task to kill in out of memory conditions. A local, unprivileged could exploit this flaw to cause a denial of service. (CVE-2011-2498) A flaw was discovered in the TOMOYO LSM's handling of mount system calls. An unprivileged user could oops the system causing a denial of service. (CVE-2011-2518) Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service. (CVE-2011-3353) A bug was discovered in the Linux kernel's calculation of OOM (Out of memory) scores, that would result in the wrong process being killed. A user could use this to kill the process with the highest OOM score, even if that process belongs to another user or the system. (CVE-2011-4097) A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual interrupt control is not available a local user could use this to cause a denial of service by starting a timer. (CVE-2011-4622) A flaw was discovered in the XFS filesystem. If a local user mounts a specially crafted XFS image it could potential execute arbitrary code on the system. (CVE-2012-0038) Chen Haogang discovered an integer overflow that could result in memory corruption. A local unprivileged user could use this to crash the system. (CVE-2012-0044) A flaw was found in the linux kernels IPv4 IGMP query processing. A remote attacker could exploit this to cause a denial of service. (CVE-2012-0207) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 10.04 LTS: linux-image-2.6.38-13-generic 2.6.38-13.56~lucid1 linux-image-2.6.38-13-generic-pae 2.6.38-13.56~lucid1 linux-image-2.6.38-13-server 2.6.38-13.56~lucid1 linux-image-2.6.38-13-virtual 2.6.38-13.56~lucid1 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well. References: CVE-2011-2498, CVE-2011-2518, CVE-2011-3353, CVE-2011-4097, CVE-2011-4622, CVE-2012-0038, CVE-2012-0044, CVE-2012-0207 Package Information: -- ubuntu-security-announce mailing list Modify settings or unsubscribe at:

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