CVE-2021-3629 json
Undertow Uncontrolled Resource Consumption
published 2022-05-24 4 y ago modified 2026-06-17 4 mo ago also GHSA-rf6q-vx79-mjxr , EUVD-2022-5156
- cvss
- 5.9
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
A flaw was found in Undertow. A potential security issue in flow control handling by the browser over http/2 may potentially cause overhead or a denial of service in the server. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.40.Final and prior to 2.2.11.Final.
Patch / fix
- maven io.undertow:undertow-core 2.0.40.Final, 2.2.11.Final
- redhat undertow 2.0.40, 2.2.11
- redhat wildfly_core 17.0
- undertow Debian 14 2.2.12-1
debian advisories DEBIAN-CVE-2021-3629
- eap7-jsoup jboss enterprise application platform 7.4, jboss enterprise application platform 7.3 1.14.2-1.redhat_00002.1.el8eap
- eap7-wss4j jboss enterprise application platform 7.3 2.2.7-1.redhat_00001.1.el8eap
- eap7-wildfly jboss enterprise application platform 7.3 7.3.10-2.GA_redhat_00003.1.el8eap
- eap7-resteasy jboss enterprise application platform 7.3 3.11.5-1.Final_redhat_00001.1.el8eap
- eap7-undertow jboss enterprise application platform 7.3 2.0.41-1.SP1_redhat_00001.1.el8eap
- eap7-apache-cxf jboss enterprise application platform 7.3 3.3.12-1.redhat_00001.1.el8eap
- eap7-jakarta-el jboss enterprise application platform 7.3 3.0.3-3.redhat_00007.1.el8eap
- eap7-ironjacamar jboss enterprise application platform 7.3 1.5.3-1.Final_redhat_00001.1.el8eap
red hat advisories RHSA-2021:5151RHSA-2021:5150RHSA-2021:5149RHSA-2021:4677RHSA-2021:4676
Exploit prediction
1.32% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | io.undertow:undertow-core | <2.0.40.Final >=2.1.0, <2.2.11.Final |
2.0.40.Final 2.2.11.Final |
Affected products
- n/a undertow
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
bugzilla.redhat.com
/show_bug.cgi?id=1977362
web, issue-tracking, third-party-advisory
-
security.netapp.com
/advisory/ntap-20220729-0008/
third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-3629
advisory
-
github.com
/undertow-io/undertow
package
-
security.netapp.com
/advisory/ntap-20220729-0008
web
Sources
- CVE List CVE-2021-3629
- GitHub Advisory GHSA-rf6q-vx79-mjxr
- NVD CVE-2021-3629
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.