JUNOS Kernel Crash PoC

Juniper Networks just released a security advisory PSN-2010-01-623, which states that the JUNOS kernel will crash (i.e. core) when a specifically crafted TCP option is received on a listening TCP port. The packet cannot be filtered with JUNOS's firewall filter. A router receiving this specific TCP packet will crash and reboot. As one can imagine this is a serious vulnerability, as this can bring down a router with a single packet attack.

For more info, please have a look at this blog post. Below is a video of the DoS attack on a JunOS based router.

Vivek Ramachandran is a security evangelist and has been working in computer security related fields for the past 7 years. In 2007, Vivek spoke at world renowned conferences Defcon (WEP Cloaking Exposed) and Toorcon (The Caffe Latte Attack). The discovery of the Caffe Latte Attack was covered by CBS5 news, BBC online, Network World etc news agencies.In 2006, Vivek was announced as one of winners of the Microsoft Security Shootout contest held in India among 65,000 participants. He has also been a recipient of a Team Achievement at Cisco Systems for his work on 802.1x and Port Security modules on the Catalyst 6500 switches. Currently he spends all of his time maintaining Security- Freak.Net , SecurityTube.Net and is the co-founder of Axonize. Vivek, is a Bachelor in Electronics and Communications Engineering from the prestigious Indian Institute of Technology, Guwahati.You can contact him at vivek[at]securitytube.net