Fortinet FortiGate Web filter URL bypass
| fortinet-web-filter-bypass (24626) |  Low Risk |
Description:
Multiple Fortinet FortiGate security appliances running FortiOS could allow certain specially-crafted URLs to bypass the Web filter. A malicious user could create a malformed HTTP request to bypass the URL blocking feature and gain access to prohibited Web sites.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Upgrade to the latest version of Fortinet FortiGate (3.0 GA or later), available from the Fortinet FortiGate Web site. See References.
References:
- Fortinet Inc. Web site: Fortinet: Award-Winning Products: complete, real-time network protection solutions.
- Full-Disclosure Mailing List, Mon Feb 13 2006 - 02:11:00 CST : URL filter bypass in Fortinet.
- BID-16599: Fortinet FortiGate URL Filtering Bypass Vulnerability
- CVE-2005-3058: 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.
- SA18844: FortiGate URL Filter and Virus Scanning Bypass Vulnerabilities
- VUPEN/ADV-2006-0539: FortiGate URL Filter and Virus Scanning Features Bypass Vulnerabilities
Platforms Affected:
- Fortinet FortiGate FortiOS 2.80
Reported:
Feb 13, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.