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mod_access_referer -- null pointer dereference vulnerability


A malformed Referer header field causes the Apache ap_parse_uri_components function to discard it with the result that a pointer is not initialized. The mod_access_referer module does not take this into account with the result that it may use such a pointer.

The null pointer vulnerability may possibly be used in a remote denial of service attack against affected Apache servers.



portaudit: mod_access_referer -- null pointer dereference vulnerability

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If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Officer. Refer to "FreeBSD Security Information" for more information.

Oliver Eikemeier <>