It was discovered that crashes in the Javascript engine of Iceweasel, an unbranded version of the Firefox browser, could potentially lead to the execution of arbitrary code.
For the stable distribution (etch), this problem has been fixed in version 2.0.0.14-0etch1.
For the unstable distribution (sid), this problem has been fixed in version 2.0.0.14-1.
We recommend that you upgrade your iceweasel package.
MD5 checksums of the listed files are available in the original advisory.