Description
The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.
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.
Metasploit 1 module
-
Cisco IOS HTTP GET /%% Request Denial of Service
auxiliary/dos/cisco/ios_http_percentpercent
Exploit-DB 1
- Cisco IOS 11.x/12.x - HTTP %% EDB-19882 · remote · Apr 26, 2000 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 20000514 Cisco IOS HTTP Server Vulnerability vendor-advisory
- 20000426 Cisco HTTP possible bug: mailing-list
- 1302 vdb-entry
- 1154 vdb-entry