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Ubuntu alert USN-1140-1 (pam)
========================================================================== Ubuntu Security Notice USN-1140-1 May 30, 2011 pam vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS - Ubuntu 8.04 LTS Summary: An attacker could cause PAM to read or delete arbitrary files or cause it to crash. Software Description: - pam: Pluggable Authentication Modules Details: Marcus Granado discovered that PAM incorrectly handled configuration files with non-ASCII usernames. A remote attacker could use this flaw to cause a denial of service, or possibly obtain login access with a different users username. This issue only affected Ubuntu 8.04 LTS. (CVE-2009-0887) It was discovered that the PAM pam_xauth, pam_env and pam_mail modules incorrectly handled dropping privileges when performing operations. A local attacker could use this flaw to read certain arbitrary files, and access other sensitive information. (CVE-2010-3316, CVE-2010-3430, CVE-2010-3431, CVE-2010-3435) It was discovered that the PAM pam_namespace module incorrectly cleaned the environment during execution of the namespace.init script. A local attacker could use this flaw to possibly gain privileges. (CVE-2010-3853) It was discovered that the PAM pam_xauth module incorrectly handled certain failures. A local attacker could use this flaw to delete certain unintended files. (CVE-2010-4706) It was discovered that the PAM pam_xauth module incorrectly verified certain file properties. A local attacker could use this flaw to cause a denial of service. (CVE-2010-4707) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.04: libpam-modules 1.1.2-2ubuntu8.2 Ubuntu 10.10: libpam-modules 1.1.1-4ubuntu2.2 Ubuntu 10.04 LTS: libpam-modules 1.1.1-2ubuntu5.2 Ubuntu 8.04 LTS: libpam-modules 0.99.7.1-5ubuntu6.3 In general, a standard system update will make all the necessary changes. References: CVE-2009-0887, CVE-2010-3316, CVE-2010-3430, CVE-2010-3431, CVE-2010-3435, CVE-2010-3853, CVE-2010-4706, CVE-2010-4707 Package Information: https://launchpad.net/ubuntu/+source/pam/1.1.2-2ubuntu8.2 https://launchpad.net/ubuntu/+source/pam/1.1.1-4ubuntu2.2 https://launchpad.net/ubuntu/+source/pam/1.1.1-2ubuntu5.2 https://launchpad.net/ubuntu/+source/pam/0.99.7.1-5ubuntu6.3 -- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security... (Log in to post comments)
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