UBUNTU-CVE-2021-25122

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    UBUNTU-CVE-2021-25122

    Published: 1 Mar 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-25122

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2021-25122, https://www.openwall.com/lists/oss-security/2021/03/01/1, http://www.openwall.com/lists/oss-security/2021/03/01/1, https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cannounce.apache.org%3E, https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cannounce.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cdev.tomcat.apache.org%3E, https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cusers.tomcat.apache.org%3E, https://lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9@%3Cdev.tomcat.apache.org%3E, https://ubuntu.com/security/notices/USN-5360-1, https://www.cve.org/CVERecord?id=CVE-2021-25122, https://ubuntu.com/security/notices/USN-6943-1

    Affected packages

    Package

    Name: tomcat9

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -9.0.16-3ubuntu0.18.04.2

    Affected versions

    9.0.16-3~18.04.1
    9.0.16-3ubuntu0.18.04.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2021-25122 | CVE-DB