CVSS 3.1
5.9 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-3597
A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.
Severity
- EPSS
- 1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-31)
- CWE
- CWE-362
- Published
- Modified
- Record from
- the NVD, synced
Affected
- netapp:active_iq_unified_manager
- netapp:oncommand_insight
- netapp:oncommand_workflow_automation
- redhat:fuse
- redhat:jboss_enterprise_application_platform
- redhat:openshift_application_runtimes
- redhat:single_sign-on
- redhat:undertow
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mfhv-gwf8-4m88 | Maven | io.undertow:undertow-core | >=2.1.0 <2.2.9.Final | 2.2.9.Final |
| GHSA-mfhv-gwf8-4m88 | Maven | io.undertow:undertow-core | <2.0.39.Final | 2.0.39.Final |