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Ubuntu 14.04 LTS USN-2599-2: Severe Kernel Crash Risk Advisory

USN-2599-1 Introduced a regression in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-2599-2 May 09, 2015 linux-lts-utopic vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: USN-2599-1 Introduced a regression in the Linux kernel. Software Description: - linux-lts-utopic: Linux hardware enablement kernel from Utopic Details: USN-2599-1 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 14.04 LTS: linux-image-3.16.0-37-generic 3.16.0-37.51~14.04.1 linux-image-3.16.0-37-generic-lpae 3.16.0-37.51~14.04.1 linux-image-3.16.0-37-lowlatency 3.16.0-37.51~14.04.1 linux-image-3.16.0-37-powerpc-e500mc 3.16.0-37.51~14.04.1 linux-image-3.16.0-37-powerpc-smp 3.16.0-37.51~14.04.1 linux-image-3.16.0-37-powerpc64-emb 3.16.0-37.51~14.04.1 linux-image-3.16.0-37-powerpc64-smp 3.16.0-37.51~14.04.1 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-2599-2 https://ubuntu.com/security/notices/USN-2599-1 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450442 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-37.51~14.04.1 . Ubuntu Security NoticeUSN-2599-3 resolves an issue in the Linux kernel impacting 16.04 LTS platforms.. Linux Kernel Security, System Update Management, Ubuntu Advisory. . Severity: Critical. LinuxSecurity.com Team

May 09, 2015 •Critical Ubuntu