Information Exposure Affecting org.apache.tomcat:tomcat-util package, versions [7,7.0.74) [8.5.0,8.5.9) [8.0.0RC1,8.0.40) [9.0.0M1,9.0.0M15)



    Attack Complexity Low
    Confidentiality High

    Threat Intelligence

    EPSS 0.65% (79th percentile)
Expand this section
7.5 high
Expand this section
Red Hat
7.5 high

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  • published 13 Dec 2016
  • disclosed 13 Dec 2016
  • credit Unknown

How to fix?

Upgrade org.apache.tomcat:tomcat-util to version 7.0.74, 8.5.9, 8.0.40, 9.0.0M15 or higher.


org.apache.tomcat:tomcat-util is a Common code shared by multiple Tomcat components.

Affected versions of this package are vulnerable to Information Exposure. The refactoring of the Connector code for 8.5.x onwards introduced a regression in the error handling of the send file code for the NIO HTTP connector. An error during send file processing 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.