Description
Interpretation conflict in Fortinet FortiGate 2.8, running FortiOS 2.8MR10 and v3beta, allows remote attackers to bypass the URL blocker via an (1) HTTP request terminated with a line feed (LF) and not carriage return line feed (CRLF) or (2) HTTP request with no Host field, which is still processed by most web servers without violating RFC2616.
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
- Fortinet Fortigate 2.x/3.0 - URL Filtering Bypass EDB-27203 · remote · Feb 13, 2006 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 20060213 URL filter bypass in Fortinet mailing-list
- 20060213 URL filter bypass in Fortinet mailing-list
- fortinet-web-filter-bypass(24626) vdb-entry
- 16599 vdb-entry
- 18844 third-party-advisory
- http://www.fortiguard.com/advisory/FGA-2006-10.html
- ADV-2006-0539 vdb-entry