Oracle 9iAS 1.0.2.x compiles JSP files in the _pages directory with world-readable permissions under the web root, which allows remote attackers to obtain sensitive information derived from the JSP code, including usernames and passwords, via a direct HTTP request to _pages.
https://exchange.xforce.ibmcloud.com/vulnerabilities/8100
http://www.securityfocus.com/bid/4034
http://www.kb.cert.org/vuls/id/547459
http://www.cert.org/advisories/CA-2002-08.html
http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf