The GIOP service in TNS Listener in the Oracle Net Services component in Oracle Database 9.0.1.5+, 9.2.0.8, 9.2.0.8DV, 10.1.0.5, and 10.2.0.3 allows remote attackers to cause a denial of service (crash) or read potentially sensitive memory via a connect GIOP packet with an invalid data size, which triggers a buffer over-read, aka DB22.
http://www.vupen.com/english/advisories/2007/3626
http://www.vupen.com/english/advisories/2007/3524
http://www.us-cert.gov/cas/techalerts/TA07-290A.html
http://www.securitytracker.com/id?1018823
http://www.securityfocus.com/bid/26103
http://www.securityfocus.com/archive/1/482423/100/0/threaded
http://www.oracle.com/technetwork/topics/security/cpuoct2007-092913.html
http://www.ngssoftware.com/advisories/high-risk-vulnerability-in-oracle-tns-listener/
http://securityreason.com/securityalert/3250
http://secunia.com/advisories/27409