The remote host is missing an update to iceweasel announced via advisory DSA 2268-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202268-1

Several vulnerabilities have been found in Iceweasel, a web browser based on Firefox: CVE-2011-0083 / CVE-2011-2363 regenrecht discovered two use-after-frees in SVG processing, which could lead to the execution of arbitrary code. CVE-2011-0085 regenrecht discovered a use-after-free in XUL processing, which could lead to the execution of arbitrary code. CVE-2011-2362 David Chan discovered that cookies were insufficiently isolated. CVE-2011-2371 Chris Rohlf and Yan Ivnitskiy discovered an integer overflow in the Javascript engine, which could lead to the execution of arbitrary code. CVE-2011-2373 Martin Barbella discovered a use-after-free in XUL processing, which could lead to the execution of arbitrary code. CVE-2011-2374 Bob Clary, Kevin Brosnan, Nils, Gary Kwong, Jesse Ruderman and Christian Biesinger discovered memory corruption bugs, which may lead to the execution of arbitrary code. CVE-2011-2376 Luke Wagner and Gary Kwong discovered memory corruption bugs, which may lead to the execution of arbitrary code. For the oldstable distribution (lenny), this problem has been fixed in version 1.9.0.19-12 of the xulrunner source package. For the stable distribution (squeeze), this problem has been fixed in version 3.5.16-9. For the unstable distribution (sid), this problem has been fixed in version 3.5.19-3 For the experimental distribution, this problem has been fixed in version 5.0-1. We recommend that you upgrade your iceweasel packages.