QID 356166

Date Published: 2023-09-28

QID 356166: Amazon Linux Security Advisory for tomcat : ALASTOMCAT9-2023-005

The simplified implementation of blocking reads and writes introduced in tomcat 10 and back-ported to tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in apache tomcat 10.1.0 to 10.1.0-m12, 10.0.0-m1 to 10.0.18, 9.0.0-m1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an http11processor instance resulting in responses, or part responses, to be received by the wrong client. (
( CVE-2021-43980) if apache tomcat 8.5.0 to 8.5.82, 9.0.0-m1 to 9.0.67, 10.0.0-m1 to 10.0.26 or 10.1.0-m1 to 10.1.0 was configured to ignore invalid http headers via setting rejectillegalheader to false (the default for 8.5.x only), tomcat did not reject a request containing an invalid content-length header making a request smuggling attack possible if tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header. (
( CVE-2022-42252)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALASTOMCAT9-2023-005 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356166

    CVE-2021-43980 | CVE-2022-42252 |
    Software Advisories
    Advisory ID Software Component Link
    ALASTOMCAT9-2023-005 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASTOMCAT9-2023-005.html
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