Stay Secure with the Latest Linux Advisories

security advisorydenial of serviceupdate instructions

Ubuntu: 1419-2 Significant: OpenSSL Denial Of Service Risk

The GnuTLS library could be made to crash under certain conditions.. =========================================================================Ubuntu Security Notice USN-1418-1 April 05, 2012 gnutls13, gnutls26 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.10 - Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS - Ubuntu 8.04 LTS Summary: The GnuTLS library could be made to crash under certain conditions. Software Description: - gnutls26: the GNU TLS library - commandline utilities - gnutls13: the GNU TLS library - commandline utilities Details: Alban Crequy discovered that the GnuTLS library incorrectly checked array bounds when copying TLS session data. A remote attacker could crash a client application, leading to a denial of service, as the client application prepared for TLS session resumption. (CVE-2011-4128) Matthew Hall discovered that the GnuTLS library incorrectly handled TLS records. A remote attacker could crash client and server applications, leading to a denial of service, by sending a crafted TLS record. (CVE-2012-1573) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.10: libgnutls26 2.10.5-1ubuntu3.1 Ubuntu 11.04: libgnutls26 2.8.6-1ubuntu2.1 Ubuntu 10.10: libgnutls26 2.8.6-1ubuntu0.1 Ubuntu 10.04 LTS: libgnutls26 2.8.5-2ubuntu0.1 Ubuntu 8.04 LTS: libgnutls13 2.0.4-1ubuntu2.7 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-1418-1 CVE-2011-4128, CVE-2012-1573 Package Information: https://launchpad.net/ubuntu/+source/gnutls26/2.10.5-1ubuntu3.1 https://launchpad.net/ubuntu/+source/gnutls26/2.8.6-1ubuntu2.1 https://launchpad.net/ubuntu/+source/gnutls26/2.8.6-1ubuntu0.1 https://launchpad.net/ubuntu/+source/gnutls26/2.8.5-2ubuntu0.1 https://launchpad.net/ubuntu/+source/gnutls13/2.0.4-1ubuntu2.7 . Enhance your Ubuntu installation by resolving the GnuTLS vulnerabilities highlighted on April 05, 2012, to avoid any potential system failures.. GnuTLS, Ubuntu Update, Denial of Service. . Severity: Critical. LinuxSecurity.com Team

Apr 05, 2012 •Critical Ubuntu