Remote Code Execution (RCE) Affecting org.apache.tomcat:tomcat-catalina package, versions [10.0.0-M1, 10.0.0-M5) [9.0.0M1, 9.0.35) [8.5.0, 8.5.55) [7.0.0, 7.0.104)

  • Exploit Maturity


  • Attack Complexity


  • Confidentiality


  • Integrity


  • Availability


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  • snyk-id


  • published

    20 May 2020

  • disclosed

    21 May 2020

  • credit

    Apache Tomcat Security Team

How to fix?

Upgrade org.apache.tomcat:tomcat-catalina to version 10.0.0-M5, 9.0.35, 8.5.55, 7.0.104 or higher.


org.apache.tomcat:tomcat-catalina is a Tomcat Servlet Engine Core Classes and Standard implementations.

Affected versions of this package are vulnerable to Remote Code Execution (RCE). If an attacker is able to control the contents and name of a file on the server; and the server is configured to use the PersistenceManager with a FileStore; and the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control.