{"id":"UBUNTU-CVE-2021-25122","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.","modified":"2026-01-30T01:05:12.633512Z","published":"2021-03-01T12:15:00Z","related":["USN-5360-1","USN-6943-1"],"upstream":["CVE-2021-25122"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-25122"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2021/03/01/1"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2021/03/01/1"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.tomcat.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cannounce.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cannounce.tomcat.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cdev.tomcat.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cusers.tomcat.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9@%3Cdev.tomcat.apache.org%3E"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5360-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-25122"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6943-1"}],"affected":[{"package":{"name":"tomcat9","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tomcat9@9.0.16-3ubuntu0.18.04.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.16-3ubuntu0.18.04.2"}]}],"versions":["9.0.16-3~18.04.1","9.0.16-3ubuntu0.18.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libtomcat9-embed-java","binary_version":"9.0.16-3ubuntu0.18.04.2"},{"binary_name":"libtomcat9-java","binary_version":"9.0.16-3ubuntu0.18.04.2"},{"binary_version":"9.0.16-3ubuntu0.18.04.2","binary_name":"tomcat9"},{"binary_name":"tomcat9-admin","binary_version":"9.0.16-3ubuntu0.18.04.2"},{"binary_name":"tomcat9-common","binary_version":"9.0.16-3ubuntu0.18.04.2"},{"binary_name":"tomcat9-docs","binary_version":"9.0.16-3ubuntu0.18.04.2"},{"binary_name":"tomcat9-examples","binary_version":"9.0.16-3ubuntu0.18.04.2"},{"binary_version":"9.0.16-3ubuntu0.18.04.2","binary_name":"tomcat9-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-25122.json"}},{"package":{"name":"tomcat8","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tomcat8@8.5.39-1ubuntu1~18.04.3+esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.5.39-1ubuntu1~18.04.3+esm2"}]}],"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"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libtomcat8-embed-java","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"},{"binary_name":"libtomcat8-java","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"},{"binary_name":"tomcat8","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"},{"binary_name":"tomcat8-admin","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"},{"binary_name":"tomcat8-common","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"},{"binary_name":"tomcat8-docs","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"},{"binary_name":"tomcat8-examples","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"},{"binary_name":"tomcat8-user","binary_version":"8.5.39-1ubuntu1~18.04.3+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-25122.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tomcat9@9.0.31-1ubuntu0.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.31-1ubuntu0.2"}]}],"versions":["9.0.24-1","9.0.27-1","9.0.31-1","9.0.31-1ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libtomcat9-embed-java","binary_version":"9.0.31-1ubuntu0.2"},{"binary_name":"libtomcat9-java","binary_version":"9.0.31-1ubuntu0.2"},{"binary_version":"9.0.31-1ubuntu0.2","binary_name":"tomcat9"},{"binary_name":"tomcat9-admin","binary_version":"9.0.31-1ubuntu0.2"},{"binary_version":"9.0.31-1ubuntu0.2","binary_name":"tomcat9-common"},{"binary_name":"tomcat9-docs","binary_version":"9.0.31-1ubuntu0.2"},{"binary_name":"tomcat9-examples","binary_version":"9.0.31-1ubuntu0.2"},{"binary_name":"tomcat9-user","binary_version":"9.0.31-1ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-25122.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}