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Ubuntu alert USN-1242-1 (linux-lts-backport-maverick)

From:  Marc Deslauriers <marc.deslauriers@canonical.com>
To:  ubuntu-security-announce@lists.ubuntu.com
Subject:  [USN-1242-1] Linux kernel (Maverick backport) vulnerabilities
Date:  Tue, 25 Oct 2011 11:03:23 -0400
Message-ID:  <1319555003.11244.46.camel@mdlinux>
Archive-link:  Article, Thread

========================================================================== Ubuntu Security Notice USN-1242-1 October 25, 2011 linux-lts-backport-maverick vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 10.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux-lts-backport-maverick: Linux kernel backport from Maverick Details: It was discovered that the security fix for CVE-2010-4250 introduced a regression. A remote attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1479) Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2494) Vasiliy Kulikov discovered that /proc/PID/io did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2495) It was discovered that the EXT4 filesystem contained multiple off-by-one flaws. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2695) Christian Ohm discovered that the perf command looks for configuration files in the current directory. If a privileged user were tricked into running perf in a directory containing a malicious configuration file, an attacker could run arbitrary commands and possibly gain privileges. (CVE-2011-2905) Vasiliy Kulikov discovered that the Comedi driver did not correctly clear memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy. (CVE-2011-2909) Dan Kaminsky discovered that the kernel incorrectly handled random sequence number generation. An attacker could use this flaw to possibly predict sequence numbers and inject packets. (CVE-2011-3188) Yogesh Sharma discovered that CIFS did not correctly handle UNCs that had no prefixpaths. A local attacker with access to a CIFS partition could exploit this to crash the system, leading to a denial of service. (CVE-2011-3363) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 10.04 LTS: linux-image-2.6.35-30-generic 2.6.35-30.61~lucid1 linux-image-2.6.35-30-generic-pae 2.6.35-30.61~lucid1 linux-image-2.6.35-30-server 2.6.35-30.61~lucid1 linux-image-2.6.35-30-virtual 2.6.35-30.61~lucid1 After a standard system update you need to reboot your computer to make all the necessary changes. References: http://www.ubuntu.com/usn/usn-1242-1 CVE-2011-1479, CVE-2011-2494, CVE-2011-2495, CVE-2011-2695, CVE-2011-2905, CVE-2011-2909, CVE-2011-3188, CVE-2011-3363 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-backport-m... -- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security...


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