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-2013-0801, CVE-2013-1674, CVE-2013-1675, CVE-2013-1676,CVE-2013-1677, CVE-2013-1678, CVE-2013-1679, CVE-2013-1680, CVE-2013-1681)A flaw was found in the way Firefox handled Content Level Constructors. Amalicious site could use this flaw to perform cross-site scripting (XSS)attacks. (CVE-2013-1670)Red Hat would like to thank the Mozilla project for reporting these issues.Upstream acknowledges Christoph Diehl, Christian Holler, Jesse Ruderman,Timothy Nikkel, Jeff Walden, Nils, Ms2ger, Abhishek Arya, and Cody Crewsas the original reporters of these issues.For technical details regarding these flaws, refer to the Mozilla securityadvisories for Firefox 17.0.6 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 17.0.6 ESR, which corrects these issues. After installingthe update, Firefox must be restarted for the changes to take effect.