Vulnerability · Published May 24, 2022 · Assigned by redhat
CVE-2021-3629
Medium 5.9
In plain English
A medium-severity uncontrolled resource consumption in undertow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.9Medium
Exploit odds (30 days)1.3%top 29.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | undertow | 2.2.12-1 | DEBIAN-CVE-2021-3629 |
| Maven | io.undertow:undertow-core | 2.0.40.Final | GHSA-rf6q-vx79-mjxr |
| Maven | io.undertow:undertow-core | 2.2.11.Final | GHSA-rf6q-vx79-mjxr |
| Ubuntu:25.10 | undertow | no fix listed | UBUNTU-CVE-2021-3629 |
| Ubuntu:26.04:LTS | undertow | no fix listed | UBUNTU-CVE-2021-3629 |
| Ubuntu:26.10 | undertow | no fix listed | UBUNTU-CVE-2021-3629 |
Affected products (as reported)
Weakness: CWE-400
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1977362 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220729-0008/ x_refsource_CONFIRM