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Ubuntu 12.04 LTS: USN-1970-1 Moderate: Linux Kernel Denial of Service

Several security issues were fixed in the kernel.. =========================================================================Ubuntu Security Notice USN-1970-1 September 27, 2013 linux-lts-quantal vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux-lts-quantal: Linux hardware enablement kernel from Quantal Details: Vince Weaver discovered a flaw in the perf subsystem of the Linux kernel on ARM platforms. A local user could exploit this flaw to gain privileges or cause a denial of service (system crash). (CVE-2013-4254) A failure to validate block numbers was discovered in the Linux kernel's implementation of the XFS filesystem. A local user can cause a denial of service (system crash) if they can mount, or cause to be mounted a corrupted or special crafted XFS filesystem. (CVE-2013-1819) An information leak was discovered in the Linux kernel's IPSec key_socket when using the notify_policy interface. A local user could exploit this flaw to examine potentially sensitive information in kernel memory. (CVE-2013-2237) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.5.0-41-generic 3.5.0-41.64~precise1 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), astandard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-1970-1 CVE-2013-1819, CVE-2013-2237, CVE-2013-4254 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-41.64~precise1 . =========================================================================Ubuntu Security Notice USN-. security, kernel, ==================================================. . LinuxSecurity.com Team

Sep 27, 2013 Ubuntu