Description
Cisco 6000, 6500, and 7600 series systems with Multilayer Switch Feature Card 2 (MSFC2) and a FlexWAN or OSM module allow local users to cause a denial of service (hang or reset) by sending a layer 2 frame packet that encapsulates a layer 3 packet, but has inconsistent length values with that packet.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Cisco IOS 12 MSFC2 - Layer 2 Frame Denial of Service EDB-23638 · dos · Feb 3, 2004 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 10780 third-party-advisory
- 9562 vdb-entry
- cisco-malformed-frame-dos(15013) vdb-entry
- 20040203 Cisco 6000/6500/7600 Crafted Layer 2 Frame Vulnerability vendor-advisory
- oval:org.mitre.oval:def:5828 vdb-entry signature
- VU#810062 third-party-advisory