CVE 2008-4308
The doRead method in Apache Tomcat 4.1.32 through 4.1.34 and 5.5.10 through 5.5.20 does not return a -1 to indicate when a certain error condition has occurred, which can cause Tomcat to send POST content from one request to a different request.
See the 
CVE page on Mitre.org
for more details.
