CVE Catalog

CVE-2005-3058

High
Published: Translated: NVD NIST

Summary

Interpretation conflict in Fortinet FortiGate 2.8 running FortiOS 2.8MR10 and v3beta allows remote attackers to bypass the URL blocker via an HTTP request terminated with a line feed (LF) and not carriage return line feed (CRLF) or an HTTP request with no Host field, which is still processed by most web servers without violating RFC2616.

Risk Assessment

The risk involves the possibility of bypassing URL filtering mechanisms, which could lead to unauthorized access to blocked websites and potential violation of the organization's security policy.

Recommendation

It is recommended to upgrade FortiOS to a version not vulnerable to this interpretation conflict and implement additional HTTP traffic filtering rules that account for non-standard request formats.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS