Patches for Shellshock alone won’t fix already-compromised systems.
by Sean Gallagher - Oct 15 2014The long, painful rollout of patches to a security flaw in the Bourne Again Shell (bash) has left thousands of systems still vulnerable, and malware based on the vulnerability continues to spread, according to a number of security experts. But even for organizations that have already applied the patch for what has been dubbed the “Shellshock” vulnerability, the cleanup may not be over—and it could be long and expensive.
Soon after the Shellshock bug was publicly disclosed and its initial patch was distributed, weaknesses in the patch itself and additional security vulnerabilities were uncovered by developers dealing with the issue. And within a day of the disclosure, attacks exploiting the vulnerability were found in the wild. Some of those attacks are still trying to spread—and in some cases, they’re using Google searches to help them find potential targets. Successful attacks may have made changes to the targeted systems that would not have been corrected by the application of the patch.
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