========================================================================== Ubuntu Security Notice USN-1809-1 May 01, 2013 linux 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: Linux kernel Details: Mathias Krause discovered an information leak in the Linux kernel's UDF file system implementation. A local user could exploit this flaw to examine some of the kernel's heap memory. (CVE-2012-6548) Mathias Krause discovered an information leak in the Linux kernel's ISO 9660 CDROM file system driver. A local user could exploit this flaw to examine some of the kernel's heap memory. (CVE-2012-6549) An integer overflow was discovered in the Direct Rendering Manager (DRM) subsystem for the i915 video driver in the Linux kernel. A local user could exploit this flaw to cause a denial of service (crash) or potentially escalate privileges. (CVE-2013-0913) Andrew Honig discovered a flaw in guest OS time updates in the Linux kernel's KVM (Kernel-based Virtual Machine). A privileged guest user could exploit this flaw to cause a denial of service (crash host system) or potential escalate privilege to the host kernel level. (CVE-2013-1796) Andrew Honig discovered a use after free error in guest OS time updates in the Linux kernel;s KVM (Kernel-based Virtual Machine). A privileged guest user could exploit this flaw to escalate privilege to the host kernel level. (CVE-2013-1797) Andrew Honig reported a flaw in the way KVM (Kernel-based Virtual Machine) emulated the IOAPIC. A privileged guest user could exploit this flaw to read host memory or cause a denial of service (crash the host). (CVE-2013-1798) A format-string bug was discovered in the Linux kernel's ext3 filesystem driver. A local user could exploit this flaw to possibly escalate privileges on the system. (CVE-2013-1848) A buffer overflow was discovered in the Linux Kernel's USB subsystem for devices reporting the cdc-wdm class. A specially crafted USB device when plugged-in could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2013-1860) An information leak in the Linux kernel's dcb netlink interface was discovered. A local user could obtain sensitive information by examining kernel stack memory. (CVE-2013-2634) A kernel stack information leak was discovered in the RTNETLINK component of the Linux kernel. A local user could read sensitive information from the kernel stack. (CVE-2013-2635) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.2.0-41-generic 3.2.0-41.66 linux-image-3.2.0-41-generic-pae 3.2.0-41.66 linux-image-3.2.0-41-highbank 3.2.0-41.66 linux-image-3.2.0-41-omap 3.2.0-41.66 linux-image-3.2.0-41-powerpc-smp 3.2.0-41.66 linux-image-3.2.0-41-powerpc64-smp 3.2.0-41.66 linux-image-3.2.0-41-virtual 3.2.0-41.66 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: http://www.ubuntu.com/usn/usn-1809-1 CVE-2012-6548, CVE-2012-6549, CVE-2013-0913, CVE-2013-1796, CVE-2013-1797, CVE-2013-1798, CVE-2013-1848, CVE-2013-1860, CVE-2013-2634, CVE-2013-2635 Package Information: https://launchpad.net/ubuntu/+source/linux/3.2.0-41.66
Reading our newsletter every Monday will keep you up-to-date with security news.
Receive a daily digest of the latest security news.