The remote host is missing an update to xulrunner announced via advisory DSA 2075-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202075-1

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-2010-0182 Wladimir Palant discovered that security checks in XML processing were insufficiently enforced. CVE-2010-0654 Chris Evans discovered that insecure CSS handling could lead to reading data across domain boundaries. CVE-2010-1205 Aki Helin discovered a buffer overflow in the internal copy of libpng, which could lead to the execution of arbitrary code. CVE-2010-1208 regenrecht discovered that incorrect memory handling in DOM parsing could lead to the execution of arbitrary code. CVE-2010-1211 Jesse Ruderman, Ehsan Akhgari, Mats Palmgren, Igor Bukanov, Gary Kwong, Tobias Markus and Daniel Holbert discovered crashes in the layout engine, which might allow the execution of arbitrary code. CVE-2010-1214 JS3 discovered an integer overflow in the plugin code, which could lead to the execution of arbitrary code. CVE-2010-2751 Jordi Chancel discovered that the location could be spoofed to appear like a secured page. CVE-2010-2753 regenrecht discovered that incorrect memory handling in XUL parsing could lead to the execution of arbitrary code. CVE-2010-2754 Soroush Dalili discovered an information leak in script processing. For the stable distribution (lenny), these problems have been fixed in version 1.9.0.19-3. For the unstable distribution (sid), these problems have been fixed in version 1.9.1.11-1. For the experimental distribution, these problems have been fixed in version 1.9.2.7-1. We recommend that you upgrade your xulrunner packages.