Mozilla Firefox is an open source web browser. XULRunner provides the XULRuntime environment for Mozilla Firefox.Several flaws were found in the processing of malformed web content. A webpage containing malicious content could cause Firefox to crash or,potentially, execute arbitrary code with the privileges of the user runningFirefox. (CVE-2014-1493, CVE-2014-1510, CVE-2014-1511, CVE-2014-1512,CVE-2014-1513, CVE-2014-1514)Several information disclosure flaws were found in the way Firefoxprocessed malformed web content. An attacker could use these flaws to gainaccess to sensitive information such as cross-domain content or protectedmemory addresses or, potentially, cause Firefox to crash. (CVE-2014-1497,CVE-2014-1508, CVE-2014-1505)A memory corruption flaw was found in the way Firefox rendered certain PDFfiles. An attacker able to trick a user into installing a maliciousextension could use this flaw to crash Firefox or, potentially, executearbitrary code with the privileges of the user running Firefox.(CVE-2014-1509)Red Hat would like to thank the Mozilla project for reporting these issues.Upstream acknowledges Benoit Jacob, Olli Pettay, Jan Varga, Jan de Mooij,Jesse Ruderman, Dan Gohman, Christoph Diehl, Atte Kettunen, Tyson Smith,Jesse Schwartzentruber, John Thomson, Robert O'Callahan, Mariusz Mlynski,Jüri Aedla, George Hotz, and the security research firm VUPEN as theoriginal reporters of these issues.For technical details regarding these flaws, refer to the Mozilla securityadvisories for Firefox 24.4.0 ESR. You can find a link to the Mozillaadvisories in the References section of this erratum.All Firefox users should upgrade to these updated packages, which containFirefox version 24.4.0 ESR, which corrects these issues. After installingthe update, Firefox must be restarted for the changes to take effect.