CVE-2021-25122
Apache Tomcat h2c request mix-up
7.5
HIGH
CVSS 3.1
EPSS 18.1%
Description
When responding to new h2c connection requests, Apache Tomcat versions 9.0.0 through 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.
How to fix CVE-2021-25122
To remediate CVE-2021-25122, upgrade the affected package to a fixed version below.
- —upgrade to 8.5.62 or later
- —upgrade to 9.0.43-1 or later
- —upgrade to 9.0.31-1~deb10u4 or later
- —upgrade to 10.0.2 or later
- —upgrade to 10.0.2 or later
Is CVE-2021-25122 being exploited?
Moderate — EPSS is 18.1%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (5)
- >= 8.5.0, < 8.5.62, >= 9.0.0, < 9.0.42, >= 10.0.0, < 10.0.1
- from 0, < 9.0.43-1
- from 0, < 9.0.31-1~deb10u4
- >= 10.0.0-M1, < 10.0.2
- >= 10.0.0-M1, < 10.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |