========================================================================== Ubuntu Security Notice USN-1787-1 April 02, 2013 linux vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.10 Summary: Several security issues were fixed in the kernel. Software Description: - linux: Linux kernel Details: Emese Revfy discovered that in the Linux kernel signal handlers could leak address information across an exec, making it possible to bypass ASLR (Address Space Layout Randomization). A local user could use this flaw to by pass ASLR to reliably deliver an exploit payload that would otherwise be stopped (by ASLR). (CVE-2013-0914) A memoery use after free error was discover in the Linux kernel's tmpfs filesystem. A local user could exploit this flaw to gain privileges or cause a denial of service (system crash). (CVE-2013-1767) Mateusz Guzik discovered a race in the Linux kernel's keyring. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-1792) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.10: linux-image-3.0.0-32-generic 3.0.0-32.51 linux-image-3.0.0-32-generic-pae 3.0.0-32.51 linux-image-3.0.0-32-omap 3.0.0-32.51 linux-image-3.0.0-32-powerpc 3.0.0-32.51 linux-image-3.0.0-32-powerpc-smp 3.0.0-32.51 linux-image-3.0.0-32-powerpc64-smp 3.0.0-32.51 linux-image-3.0.0-32-server 3.0.0-32.51 linux-image-3.0.0-32-virtual 3.0.0-32.51 After a standard system update you need to reboot your computer to make all the necessary changes. References: http://www.ubuntu.com/usn/usn-1787-1 CVE-2013-0914, CVE-2013-1767, CVE-2013-1792 Package Information: https://launchpad.net/ubuntu/+source/linux/3.0.0-32.51
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