Several vulnerabilities have been discovered in Iceweasel, a web browser
based on Firefox. The included XULRunner library provides rendering
services for several other applications included in Debian.
For the oldstable distribution (lenny), this problem has been fixed in
version 1.9.0.19-15 of the xulrunner source package.
For the stable distribution (squeeze), this problem has been fixed in
version 3.5.16-11.
For the unstable distribution (sid), this problem has been fixed in
version 8.0-1.
We recommend that you upgrade your iceweasel packages.