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Ubuntu 12.04 LTS USN-2796-1 Critical: Kernel Denial Of Service

Several security issues were fixed in the kernel.. =========================================================================Ubuntu Security Notice USN-2796-1 November 05, 2015 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: Dmitry Vyukov discovered that the Linux kernel did not properly initialize IPC object state in certain situations. A local attacker could use this to escalate their privileges, expose confidential information, or cause a denial of service (system crash). (CVE-2015-7613) It was discovered that the Linux kernel did not check if a new IPv6 MTU set by a user space application was valid. A remote attacker could forge a route advertisement with an invalid MTU that a user space daemon like NetworkManager would honor and apply to the kernel, causing a denial of service. (CVE-2015-0272) It was discovered that in certain situations, a directory could be renamed outside of a bind mounted location. An attacker could use this to escape bind mount containment and gain access to sensitive information. (CVE-2015-2925) Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained hardcoded attributes about the USB devices. An attacker could construct a fake WhiteHEAT USB device that, when inserted, causes a denial of service (system crash). (CVE-2015-5257) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.2.0-1473-omap4 3.2.0-1473.95 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 youmight 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: https://ubuntu.com/security/notices/USN-2796-1 CVE-2015-0272, CVE-2015-2925, CVE-2015-5257, CVE-2015-7613 Package Information: https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1473.95 . Important security patches for Ubuntu 12.04 tackling kernel vulnerabilities and service interruption risks. Ensure your defenses are up to date.. Linux Kernel Update, Ubuntu 12.04, Kernel Security Fixes. . Severity: Critical. LinuxSecurity.com Team

Nov 05, 2015 •Critical Ubuntu