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CVE-2021-25122

CVE-2021-25122 · Apache Tomcat h2c request mix-up

This page contains facts from public vulnerability sources. Check the original advisory before updating.

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

CVSS 7.5 · High · EPSS 18.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • apache tomcat

    Versions
    • ≥ Apache Tomcat 10, < 10.0.2: Affected (custom)
    • ≥ Apache Tomcat 9, < 9.0.42: Affected (custom)
    • ≥ Apache Tomcat 8.5, < 8.5.62: Affected (custom)

    Update to 10.0.2

  • tomcat9 Debian:12

    Affected ranges
    • ECOSYSTEM: < 9.0.43-1

    Update to 9.0.43-1

  • tomcat9 Debian:13

    Affected ranges
    • ECOSYSTEM: < 9.0.43-1

    Update to 9.0.43-1

  • tomcat9 Debian:14

    Affected ranges
    • ECOSYSTEM: < 9.0.43-1

    Update to 9.0.43-1

  • tomcat9 Ubuntu:18.04:LTS

    Versions
    • 9.0.16-3~18.04.1
    • 9.0.16-3ubuntu0.18.04.1
    Affected ranges
    • ECOSYSTEM: < 9.0.16-3ubuntu0.18.04.2

    Update to 9.0.16-3ubuntu0.18.04.2

  • tomcat8 Ubuntu:Pro:18.04:LTS

    Versions
    • 8.5.21-1ubuntu1
    • 8.5.29-1
    • 8.5.30-1
    • 8.5.30-1ubuntu1
    • 8.5.30-1ubuntu1.2
    • 8.5.30-1ubuntu1.3
    • 8.5.30-1ubuntu1.4
    • 8.5.39-1ubuntu1~18.04.1
    • 8.5.39-1ubuntu1~18.04.2
    • 8.5.39-1ubuntu1~18.04.3
    • 8.5.39-1ubuntu1~18.04.3+esm1
    Affected ranges
    • ECOSYSTEM: < 8.5.39-1ubuntu1~18.04.3+esm2

    Update to 8.5.39-1ubuntu1~18.04.3+esm2

  • tomcat9 Ubuntu:20.04:LTS

    Versions
    • 9.0.24-1
    • 9.0.27-1
    • 9.0.31-1
    • 9.0.31-1ubuntu0.1
    Affected ranges
    • ECOSYSTEM: < 9.0.31-1ubuntu0.2

    Update to 9.0.31-1ubuntu0.2

Original sources

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