The remote host is missing an update to xulrunner announced via advisory DSA 1306-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201306-1

Several remote vulnerabilities have been discovered in Xulrunner, a runtime environment for XUL applications. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2007-1362 Nicolas Derouet discovered that Xulrunner performs insufficient validation of cookies, which could lead to denial of service. CVE-2007-2867 Boris Zbarsky, Eli Friedman, Georgi Guninski, Jesse Ruderman, Martijn Wargers and Olli Pettay discovered crashes in the layout engine, which might allow the execution of arbitrary code. CVE-2007-2868 Brendan Eich, Igor Bukanov, Jesse Ruderman, moz_bug_r_a4 and Wladimir Palant discovered crashes in the Javascript engine, which might allow the execution of arbitrary code. CVE-2007-2869 Marcel discovered that malicous web sites can cause massive ressource comsumption through the auto completion feature, resulting in denial of service. CVE-2007-2870 moz_bug_r_a4 discovered that adding an event listener through the addEventListener() function allows cross-site scripting. CVE-2007-2871 Chris Thomas discovered that XUL popups can can be abused for spoofing or phishing attacks. The oldstable distribution (sarge) doesn't include xulrunner. For the stable distribution (etch) these problems have been fixed in version 1.8.0.12-0etch1. The unstable distribution (sid) will be fixed soon. We recommend that you upgrade your xulrunner packages.