The remote host is missing an update to xulrunner announced via advisory DSA 1797-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201797-1

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-2009-0652 Moxie Marlinspike discovered that Unicode box drawing characters inside of internationalised domain names could be used for phishing attacks. CVE-2009-1302 Olli Pettay, Martijn Wargers, Mats Palmgren, Oleg Romashin, Jesse Ruderman and Gary Kwong reported crashes in the in the layout engine, which might allow the execution of arbitrary code. CVE-2009-1303 Olli Pettay, Martijn Wargers, Mats Palmgren, Oleg Romashin, Jesse Ruderman and Gary Kwong reported crashes in the in the layout engine, which might allow the execution of arbitrary code. CVE-2009-1304 Igor Bukanov and Bob Clary discovered crashes in the Javascript engine, which might allow the execution of arbitrary code. CVE-2009-1305 Igor Bukanov and Bob Clary discovered crashes in the Javascript engine, which might allow the execution of arbitrary code. CVE-2009-1306 Daniel Veditz discovered that the Content-Disposition: header is ignored within the jar: URI scheme. CVE-2009-1307 Gregory Fleischer discovered that the same-origin policy for Flash files is inproperly enforced for files loaded through the view-source scheme, which may result in bypass of cross-domain policy restrictions. CVE-2009-1308 Cefn Hoile discovered that sites, which allow the embedding of third-party stylesheets are vulnerable to cross-site scripting attacks through XBL bindings. CVE-2009-1309 moz_bug_r_a4 discovered bypasses of the same-origin policy in the XMLHttpRequest Javascript API and the XPCNativeWrapper. CVE-2009-1311 Paolo Amadini discovered that incorrect handling of POST data when saving a web site with an embedded frame may lead to information disclosure. CVE-2009-1312 It was discovered that Iceweasel allows Refresh: headers to redirect to Javascript URIs, resulting in cross-site scripting. For the stable distribution (lenny), these problems have been fixed in version 1.9.0.9-0lenny2. As indicated in the Etch release notes, security support for the Mozilla products in the oldstable distribution needed to be stopped before the end of the regular Etch security maintenance life cycle. You are strongly encouraged to upgrade to stable or switch to a still supported browser. For the unstable distribution (sid), these problems have been fixed in version 1.9.0.9-1. We recommend that you upgrade your xulrunner packages.