| Name | CVE-2021-25122 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2594-1, DSA-4891-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| tomcat7 (PTS) | jessie, jessie (lts) | 7.0.56-3+really7.0.109-1+deb8u5 | fixed |
| stretch | 7.0.75-1 | fixed |
| tomcat8 (PTS) | jessie, jessie (lts) | 8.0.14-1+deb8u27 | fixed |
| stretch (security) | 8.5.54-0+deb9u8 | fixed |
| stretch (lts), stretch | 8.5.54-0+deb9u15 | fixed |
| tomcat9 (PTS) | buster | 9.0.31-1~deb10u6 | fixed |
| buster (security) | 9.0.31-1~deb10u12 | fixed |
| bullseye | 9.0.43-2~deb11u9 | fixed |
| bullseye (security) | 9.0.43-2~deb11u10 | fixed |
| sid, trixie, bookworm | 9.0.70-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[stretch] - tomcat7 <not-affected> (Vulnerable code introduced later)
https://www.openwall.com/lists/oss-security/2021/03/01/1
https://github.com/apache/tomcat/commit/d47c20a776e8919eaca8da9390a32bc8bf8210b1 (9.0.43)
https://github.com/apache/tomcat/commit/bb0e7c1e0d737a0de7d794572517bce0e91d30fa (8.5.63)
[jessie] - tomcat7 <not-affected> (vulnerable code was introduced later)
[jessie] - tomcat8 <not-affected> (vulnerable code was introduced later)