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Ubuntu 14.04 LTS: USN-2857-2 Critical: Linux Admin Access Issue

The system could be made to run programs as an administrator.. =========================================================================Ubuntu Security Notice USN-2857-2 January 05, 2016 linux-lts-vivid vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: The system could be made to run programs as an administrator. Software Description: - linux-lts-vivid: Linux hardware enablement kernel from Vivid Details: Nathan Williams discovered that overlayfs in the Linux kernel incorrectly handled setattr operations. A local unprivileged attacker could use this to create files with administrative permission attributes and execute arbitrary code with elevated privileges. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-3.19.0-43-generic 3.19.0-43.49~14.04.1 linux-image-3.19.0-43-generic-lpae 3.19.0-43.49~14.04.1 linux-image-3.19.0-43-lowlatency 3.19.0-43.49~14.04.1 linux-image-3.19.0-43-powerpc-e500mc 3.19.0-43.49~14.04.1 linux-image-3.19.0-43-powerpc-smp 3.19.0-43.49~14.04.1 linux-image-3.19.0-43-powerpc64-emb 3.19.0-43.49~14.04.1 linux-image-3.19.0-43-powerpc64-smp 3.19.0-43.49~14.04.1 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. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-2857-2 https://ubuntu.com/security/notices/USN-2857-1 CVE-2015-8660 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-43.49~14.04.1 . Fedora Security Advisory FSA-2023-44 discloses a critical vulnerability in the system daemon that permits unauthorized user privilege escalation.. Kernel Security, Administrative Privileges, Ubuntu 14.04 LTS Security. . Severity: Critical. LinuxSecurity.com Team

Jan 05, 2016 •Critical Ubuntu