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-2015-4513, CVE-2015-7189, CVE-2015-7194, CVE-2015-7196,CVE-2015-7198, CVE-2015-7197)A same-origin policy bypass flaw was found in the way Firefox handledcertain cross-origin resource sharing (CORS) requests. A web pagecontaining malicious content could cause Firefox to disclose sensitiveinformation. (CVE-2015-7193)A same-origin policy bypass flaw was found in the way Firefox handled URLscontaining IP addresses with white-space characters. This could lead tocross-site scripting attacks. (CVE-2015-7188)Red Hat would like to thank the Mozilla project for reporting these issues.Upstream acknowledges Christian Holler, David Major, Jesse Ruderman, TysonSmith, Boris Zbarsky, Randell Jesup, Olli Pettay, Karl Tomlinson, JeffWalden, and Gary Kwong, Michał Bentkowski, Looben Yang, Shinto K Anto,Gustavo Grieco, Vytautas Staraitis, Ronald Crane, and Ehsan Akhgari as theoriginal reporters of these issues.All Firefox users should upgrade to these updated packages, which containFirefox version 38.4.0 ESR, which corrects these issues. After installingthe update, Firefox must be restarted for the changes to take effect.