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Ubuntu 12.04 LTS USN-2357-1 Critical: Linux Kernel Denial of Service

Several security issues were fixed in the kernel.. =========================================================================Ubuntu Security Notice USN-2357-1 September 23, 2014 linux-ti-omap4 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-ti-omap4: Linux kernel for OMAP4 Details: Jack Morgenstein reported a flaw in the page handling of the KVM (Kerenl Virtual Machine) subsystem in the Linux kernel. A guest OS user could exploit this flaw to cause a denial of service (host OS memory corruption) or possibly have other unspecified impact on the host OS. (CVE-2014-3601) Chris Evans reported an flaw in the Linux kernel's handling of iso9660 (compact disk filesystem) images. An attacker who can mount a custom iso9660 image either via a CD/DVD drive or a loopback mount could cause a denial of service (system crash or reboot). (CVE-2014-5471) Chris Evans reported an flaw in the Linux kernel's handling of iso9660 (compact disk filesystem) images. An attacker who can mount a custom iso9660 image, with a self-referential CL entry, either via a CD/DVD drive or a loopback mount could cause a denial of service (unkillable mount process). (CVE-2014-5472) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.2.0-1453-omap4 3.2.0-1453.73 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 kernelversion. 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: https://ubuntu.com/security/notices/USN-2357-1 CVE-2014-3601, CVE-2014-5471, CVE-2014-5472 Package Information: https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1453.73 . Resolution for major vulnerabilities impacting the kernel in Ubuntu 12.04 LTS outlined in Security Advisory USN-2357-1.. Kernel Flaws, Ubuntu 12.04, Security Notice. . Severity: Critical. LinuxSecurity.com Team

Sep 23, 2014 •Critical Ubuntu