Apache Httpd < 1.3.31 : mod_digest nonce checking

mod_digest does not properly verify the nonce of a client response by using a AuthNonce secret. This could allow a malicious user who is able to sniff network traffic to conduct a replay attack against a website using Digest protection. Note that mod_digest implements an older version of the MD5 Digest Authentication specification which is known not to work with modern browsers. This issue does not affect mod_auth_digest.