DefenseCode Security Advisory (UPCOMING): Cisco Linksys remote preauth 0day root exploit





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Published on Jan 9, 2013


Full vulnerability description is available here:

Story behind the vulnerability...

Months ago, we've contacted Cisco about a remote preauth (root access) vulnerability in default installation of their Linksys routers that we've discovered. We gave them detailed vulnerability description along with the PoC exploit for the vulnerability.

They said that this vulnerability was already fixed in latest firmware release... Well, not this particular vulnerability, since the latest official Linksys firmware - 4.30.14, and all previous versions are still vulnerable.

Exploit shown in this video has been tested on Cisco Linksys WRT54GL, but other Linksys versions/models are probably also affected. Cisco Linksys is a very popular router with more than 70,000,000 routers sold. That's why we think that this vulnerability deserves attention.

According to our vulnerability disclosure policy, the vulnerability details will be disclosed in following 2 weeks on http://www.defensecode.com/ , BugTraq and Full Disclosure.
Due to the severity of this vulnerability, once again we would like to urge Cisco to fix this vulnerability.

The vulnerability is demonstrated in the following video:

Kind Regards,
DefenseCode LTD.
E-mail: defensecode[at]defensecode.com
Website: http://www.defensecode.com

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