Description
Cisco Catalyst 6000, 5000, or 4000 switches allow remote attackers to cause a denial of service by connecting to the SSH service with a non-SSH client, which generates a protocol mismatch error.
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 Catalyst 4000/5000/6000 6.1 - SSH Protocol Mismatch Denial of Service EDB-20509 · dos · Dec 13, 2000 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- cisco-catalyst-ssh-mismatch(5760) vdb-entry
- 2117 vdb-entry
- 20001213 Cisco Catalyst SSH Protocol Mismatch Vulnerability vendor-advisory