QID 150579

Date Published: 2022-10-06

QID 150579: Apache Tomcat Information Disclosure Vulnerability (CVE-2021-43980)

Apache Tomcat is an open source web server and servlet container developed by the Apache Software Foundation.

The simplified implementation of blocking reads and writes exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

Affected Versions:
Apache Tomcat 10.1.0-M1 to 10.1.0-M12
Apache Tomcat 10.0.0-M1 to 10.0.18
Apache Tomcat 9.0.0-M1 to 9.0.60
Apache Tomcat 8.5.0 to 8.5.77

QID Detection Logic (Unauthenticated):
This QID sends a HTTP GET request to a invalid URL and based on the response confirms the vulnerable instance of Apache Tomcat running on the host.

Successful exploitation of this vulnerability could reveal sensitive information to an unauthorized attacker.

  • CVSS V3 rated as Medium - 3.7 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Customers are advised to upgrade Apache Tomcat to new version to remediate this vulnerability. For more information please refer to Apache Tomcat Security Advisory.

    Vendor References

    CVEs related to QID 150579

    CVE-2021-43980 |
    Software Advisories
    Advisory ID Software Component Link
    Apache Tomcat URL Logo lists.apache.org/thread/3jjqbsp6j88b198x5rmg99b1qr8ht3g3
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