mod_digest for Apache before 1.3.31 does not properly verify the nonce of a client response by using a AuthNonce secret.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4416
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100108
https://exchange.xforce.ibmcloud.com/vulnerabilities/15041
http://www.trustix.org/errata/2004/0027
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2004&m=slackware-security.529643
http://www.securityfocus.com/bid/9571
http://www.redhat.com/support/errata/RHSA-2005-816.html
http://www.redhat.com/support/errata/RHSA-2004-600.html
http://www.mandriva.com/security/advisories?name=MDKSA-2004:046
http://www.mail-archive.com/dev%40httpd.apache.org/msg19014.html
http://www.mail-archive.com/dev%40httpd.apache.org/msg19007.html
http://sunsolve.sun.com/search/document.do?assetkey=1-26-57628-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101841-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101555-1
http://securitytracker.com/id?1008920