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-2011-3101, CVE-2012-1937, CVE-2012-1938, CVE-2012-1939,CVE-2012-1940, CVE-2012-1941, CVE-2012-1946, CVE-2012-1947)Note: CVE-2011-3101 only affected users of certain NVIDIA display driverswith graphics cards that have hardware acceleration enabled.It was found that the Content Security Policy (CSP) implementation inFirefox no longer blocked Firefox inline event handlers. A remote attackercould use this flaw to possibly bypass a web application's intendedrestrictions, if that application relied on CSP to protect against flawssuch as cross-site scripting (XSS). (CVE-2012-1944)If a web server hosted HTML files that are stored on a Microsoft Windowsshare, or a Samba share, loading such files with Firefox could result inWindows shortcut files (.lnk) in the same share also being loaded. Anattacker could use this flaw to view the contents of local files anddirectories on the victim's system. This issue also affected users openingHTML files from Microsoft Windows shares, or Samba shares, that are mountedon their systems. (CVE-2012-1945)For technical details regarding these flaws, refer to the Mozilla securityadvisories for Firefox 10.0.5 ESR. You can find a link to the Mozillaadvisories in the References section of this erratum.Red Hat would like to thank the Mozilla project for reporting these issues.Upstream acknowledges Ken Russell of Google as the original reporter ofCVE-2011-3101; Igor Bukanov, Olli Pettay, Boris Zbarsky, and Jesse Rudermanas the original reporters of CVE-2012-1937; Jesse Ruderman, Igor Bukanov,Bill McCloskey, Christian Holler, Andrew McCreight, and Brian Bondy as theoriginal reporters of CVE-2012-1938; Christian Holler as the originalreporter of CVE-2012-1939; security researcher Abhishek Arya of Google asthe original reporter of CVE-2012-1940, CVE-2012-1941, and CVE-2012-1947;security researcher Arthur Gerkis as the original reporter ofCVE-2012-1946; security researcher Adam Barth as the original reporter ofCVE-2012-1944; and security researcher Paul Stone as the original reporterof CVE-2012-1945.All Firefox users should upgrade to these updated packages, which containFirefox version 10.0.5 ESR, which corrects these issues. After installingthe update, Firefox must be restarted for the changes to take effect.