The remote host is missing an update to iceweasel announced via advisory DSA 1308-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201308-1

Several remote vulnerabilities have been discovered in the Iceweasel web browser, an unbranded version of the Firefox browser. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2007-1362 Nicolas Derouet discovered that Iceweasel 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. Fixes for the oldstable distribution (sarge) are not available. While there will be another round of security updates for Mozilla products, Debian doesn't have the ressources to backport further security fixes to the old Mozilla products. You're strongly encouraged to upgrade to stable as soon as possible. For the stable distribution (etch) these problems have been fixed in version 2.0.0.4-0etch1. A build for the Alpha architecture is not yet available, it will be provided later. For the unstable distribution (sid) these problems have been fixed in version 2.0.0.4-1. We recommend that you upgrade your iceweasel packages.