A bug in the handling of the pipelined requests in Apache Tomcat 9.0.0.M1 to 9.0.0.M18, 8.5.0 to 8.5.12, 8.0.0.RC1 to 8.0.42, 7.0.0 to 7.0.7

Summary

A bug in the handling of the pipelined requests in Apache Tomcat 9.0.0.M1 to 9.0.0.M18, 8.5.0 to 8.5.12, 8.0.0.RC1 to 8.0.42, 7.0.0 to 7.0.76, and 6.0.0 to 6.0.52, when send file was used, results in the pipelined request being lost when send file processing of the previous request completed. This could result in responses appearing to be sent for the wrong request. For example, a user agent that sent requests A, B and C could see the correct response for request A, the response for request C for request B and no response for request C.

Timeline

1. Apr 17, 2017, 4:00 PM UTCCVE published
2. Aug 5, 2024, 3:11 PM UTCRecord last updated
3. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Apache Software Foundation Apache Tomcat

  9.0.0.M1 to 9.0.0.M18, 8.5.0 to 8.5.12, 8.0.0.RC1 to 8.0.42, 7.0.0 to 7.0.76, 6.0.0 to 6.0.52

• org.apache.tomcat:tomcatMaven

  From 9.0.0.M1 · fixed in 9.0.0.M19

• org.apache.tomcat:tomcatMaven

  From 8.5.0 · fixed in 8.5.13

• org.apache.tomcat:tomcatMaven

  From 8.0.0 · fixed in 8.0.43

• org.apache.tomcat:tomcatMaven

  From 7.0.0 · fixed in 7.0.77

• org.apache.tomcat:tomcatMaven

  From 6.0.0 · fixed in 6.0.53

References 25