CVE-2021-42340
Description
The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 9.0.54-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 9.0.54-1 |
| sid | Fixed | 9.0.54-1 |
| forky | Fixed | 9.0.54-1 |
| bullseye | Fixed | 9.0.43-2~deb11u3 |
| bookworm | Fixed | 9.0.54-1 |
Red Hat Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.tomcat:tomcat | >=10.1.0-M1,<10.1.0-M6 | 10.1.0-M6 |
| Maven | org.apache.tomcat:tomcat | >=10.0.0-M1,<10.0.12 | 10.0.12 |
| Maven | org.apache.tomcat:tomcat | >=9.0.40,<9.0.54 | 9.0.54 |
| Maven | org.apache.tomcat:tomcat | >=8.5.60,<8.5.72 | 8.5.72 |
References
- https://access.redhat.com/errata/RHBA-2022:8077
- https://nvd.nist.gov/vuln/detail/CVE-2021-42340
- https://github.com/apache/tomcat/commit/31d62426645824bdfe076a0c0eafa904d90b4fb9
- https://github.com/apache/tomcat/commit/80f1438ec45e77a07b96419808971838d259eb47
- https://github.com/apache/tomcat/commit/d27535bdee95d252418201eb21e9d29476aa6b6a
- https://github.com/apache/tomcat/commit/d5a6660cba7f51589468937bf3bbad4db7810371
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.debian.org/security/2021/dsa-5009
- https://tomcat.apache.org/security-9.html
- https://tomcat.apache.org/security-8.html
- https://tomcat.apache.org/security-10.html
- https://security.netapp.com/advisory/ntap-20211104-0001
- https://security.gentoo.org/glsa/202208-34
- https://lists.apache.org/thread.html/r83a35be60f06aca2065f188ee542b9099695d57ced2e70e0885f905c%40%3Cannounce.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r8097a2d1550aa78e585fc77e602b9046e6d4099d8d132497c5387784@%3Ccommits.myfaces.apache.org%3E
- https://kc.mcafee.com/corporate/index?page=content&id=SB10379
- https://github.com/apache/tomcat
- https://security-tracker.debian.org/tracker/CVE-2021-42340
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.