CVE-2016-8745

Summary

A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache Tomcat9.0.0.M1 to 9.0.0.M13affected
Apache Software FoundationApache Tomcat8.5.0 to 8.5.8affected
Apache Software FoundationApache Tomcat8.0.0.RC1 to 8.0.39affected
Apache Software FoundationApache Tomcat7.0.0 to 7.0.73affected
Apache Software FoundationApache Tomcat6.0.16 to 6.0.48affected

Weaknesses

  • Information Disclosure

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References