CVE-2021-25122
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Modified - security@apache.org
- Published
- 2021-03-01
- Last modified
- 2026-10-08
- Weaknesses
- CWE-200
Affected products
- Tomcat (Apache)
- Apache Tomcat (Apache Software Foundation)
- Debian Linux (Debian)
- Agile Product Lifecycle Management (Oracle)
- Communications Cloud Native Core Policy (Oracle)
- Communications Cloud Native Core Security Edge Protection Proxy (Oracle)
- Communications Instant Messaging Server (Oracle)
- Database (Oracle)
- Graph Server And Client (Oracle)
- Instantis Enterprisetrack (Oracle)
- Managed File Transfer (Oracle)
- Mysql Enterprise Monitor (Oracle)
- Siebel Ui Framework (Oracle)
References
- https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.tomcat.apa…
- https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cusers.tomcat.apache…
- https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cdev.tomcat.apache.o…
- https://lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9%40%3Cdev.tomcat.apache.o…
- https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.apache.org…
- http://www.openwall.com/lists/oss-security/2021/03/01/1
- https://lists.apache.org/thread.html/rcd90bf36b1877e1310b87ecd14ed7bbb15da52b297efd9f0e7253a3b%40%3Cusers.tomcat.apache…
- https://lists.apache.org/thread.html/rd0463f9a5cbc02a485404c4b990f0da452e5ac5c237808edba11c947%40%3Cusers.tomcat.apache…
- https://lists.debian.org/debian-lts-announce/2021/03/msg00018.html
- https://www.debian.org/security/2021/dsa-4891
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://security.netapp.com/advisory/ntap-20210409-0002/
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://security.gentoo.org/glsa/202208-34
