The remote host is missing an update to iceweasel announced via advisory DSA 1535-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201535-1

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-2007-4879 Peter Brodersen and Alexander Klink discovered that the autoselection of SSL client certificates could lead to users being tracked, resulting in a loss of privacy. CVE-2008-1233 moz_bug_r_a4 discovered that variants of CVE-2007-3738 and CVE-2007-5338 allow the execution of arbitrary code through XPCNativeWrapper. CVE-2008-1234 moz_bug_r_a4 discovered that insecure handling of event handlers could lead to cross-site scripting. CVE-2008-1235 Boris Zbarsky, Johnny Stenback, and moz_bug_r_a4 discovered that incorrect principal handling can lead to cross-site scripting and the execution of arbitrary code. CVE-2008-1236 Tom Ferris, Seth Spitzer, Martin Wargers, John Daggett and Mats Palmgren discovered crashes in the layout engine, which might allow the execution of arbitrary code. CVE-2008-1237 georgi, tgirmann and Igor Bukanov discovered crashes in the Javascript engine, which might allow the execution of arbitrary code. CVE-2008-1238 Gregory Fleischer discovered that HTTP Referrer headers were handled incorrectly in combination with URLs containing Basic Authentication credentials with empty usernames, resulting in potential Cross-Site Request Forgery attacks. CVE-2008-1240 Gregory Fleischer discovered that web content fetched through the jar: protocol can use Java to connect to arbitrary ports. This is only an issue in combination with the non-free Java plugin. CVE-2008-1241 Chris Thomas discovered that background tabs could generate XUL popups overlaying the current tab, resulting in potential spoofing attacks. For the stable distribution (etch), these problems have been fixed in version 2.0.0.13-0etch1. The Mozilla products from the old stable distribution (sarge) are no longer supported. We recommend that you upgrade your iceweasel packages.