Several remote vulnerabilities have been discovered in Xulrunner, a runtime environment for XUL applications, such as the Iceweasel web browser. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2009-3986: David James discovered that the window.opener property allows Chrome privilege escalation. CVE-2009-3985: Jordi Chanel discovered a spoofing vulnerability of the URL location bar using the document.location property. CVE-2009-3984: Jonathan Morgan discovered that the icon indicating a secure connection could be spoofed through the document.location property. CVE-2009-3983: Takehiro Takahashi discovered that the NTLM implementaion is vulnerable to reflection attacks. CVE-2009-3981: Jesse Ruderman discovered a crash in the layout engine, which might allow the execution of arbitrary code. CVE-2009-3979: Jesse Ruderman, Josh Soref, Martijn Wargers, Jose Angel and Olli Pettay discovered crashes in the layout engine, which might allow the execution of arbitrary code. For the stable distribution , these problems have been fixed in version 1.9.0.16-1. For the unstable distribution , these problems have been fixed in version 1.9.1.6-1. We recommend that you upgrade your xulrunner packages.