PL/SQL module 3.0.9.8.2 in Oracle 9i Application Server 1.0.2.x allows remote attackers to cause a denial of service (crash) via an HTTP Authorization header without an authentication type.
https://exchange.xforce.ibmcloud.com/vulnerabilities/8099
http://www.securityfocus.com/bid/4037
http://www.kb.cert.org/vuls/id/805915
http://www.cert.org/advisories/CA-2002-08.html
http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf