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Ubuntu 12.04 LTS USN-2597-2 Critical: Kernel Regression Resolved

USN-2597-1 Introduced a regression in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-2597-2 May 08, 2015 linux-lts-trusty regression ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 LTS Summary: USN-2597-1 Introduced a regression in the Linux kernel. Software Description: - linux-lts-trusty: Linux hardware enablement kernel from Trusty Details: USN-2597-1 fixed vulnerabilities in the Linux kernel, however an unrelated regression in the auditing of some path names was introduced. Due to the regression the system could crash under certain conditions. This update fixes the problem. We apologize for the inconvenience. Original advisory details: A race condition between chown() and execve() was discovered in the Linux kernel. A local attacker could exploit this race by using chown on a setuid-user-binary to gain administrative privileges. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.13.0-52-generic 3.13.0-52.86~precise1 linux-image-3.13.0-52-generic-lpae 3.13.0-52.86~precise1 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-2597-2 https://ubuntu.com/security/notices/USN-2597-1 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450442 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-52.86~precise1 . USN-2598-1 tackles a bug in the Linux kernel that might lead to system instability in certain scenarios.. Linux Kernel Security, Ubuntu Kernel Update, Trusty HWE Issues. . Severity: Critical. LinuxSecurity.com Team

May 09, 2015 •Critical Ubuntu