The product has two different sources of the same data or information, but it uses the source that has less support for verification, is less trusted, or is less resistant to attack.
An attacker could utilize the untrusted data source to bypass protection mechanisms and gain access to sensitive data.
CVE-2001-0860Product uses IP address provided by a client, instead of obtaining it from the packet headers, allowing easier spoofing.
CVE-2004-1950Web product uses the IP address in the X-Forwarded-For HTTP header instead of a server variable that uses the connecting IP address, allowing filter bypass.
CVE-2001-0908Product logs IP address specified by the client instead of obtaining it from the packet headers, allowing information hiding.
CVE-2006-1126PHP application uses IP address from X-Forwarded-For HTTP header, instead of REMOTE_ADDR.