CVE catalog
CVE-2021-3597
DEBIAN-CVE-2021-3597
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 1.16% · Oct 27, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | undertow | 14 | 1.3.11-1 | vulnerable |
| Debian | undertow | 14 | 1.3.16-1 | vulnerable |
| Debian | undertow | 14 | 1.3.19-1 | vulnerable |
| Debian | undertow | 14 | 1.3.21-1 | vulnerable |
| Debian | undertow | 14 | 1.3.23-1 | vulnerable |
| Debian | undertow | 14 | 1.3.4-1 | vulnerable |
| Debian | undertow | 14 | 1.3.5-1 | vulnerable |
| Debian | undertow | 14 | 1.3.7-1 | vulnerable |
| Debian | undertow | 14 | 1.4.0-1 | vulnerable |
| Debian | undertow | 14 | 1.4.1-1 | vulnerable |
| Debian | undertow | 14 | 1.4.18-1 | vulnerable |
| Debian | undertow | 14 | 1.4.20-1 | vulnerable |
| Debian | undertow | 14 | 1.4.21-1 | vulnerable |
| Debian | undertow | 14 | 1.4.21-2 | vulnerable |
| Debian | undertow | 14 | 1.4.22-1 | vulnerable |
| Debian | undertow | 14 | 1.4.23-1 | vulnerable |
| Debian | undertow | 14 | 1.4.23-2 | vulnerable |
| Debian | undertow | 14 | 1.4.23-3 | vulnerable |
| Debian | undertow | 14 | 1.4.25-1 | vulnerable |
| Debian | undertow | 14 | 1.4.25-2 | vulnerable |
| Debian | undertow | 14 | 1.4.3-1 | vulnerable |
| Debian | undertow | 14 | 1.4.4-1 | vulnerable |
| Debian | undertow | 14 | 1.4.6-1 | vulnerable |
| Debian | undertow | 14 | 1.4.7-1 | vulnerable |
| Debian | undertow | 14 | 1.4.8-1 | vulnerable |
| Debian | undertow | 14 | 2.0.23-1 | vulnerable |
| Debian | undertow | 14 | 2.0.25-1 | vulnerable |
| Debian | undertow | 14 | 2.0.26-1 | vulnerable |
| Debian | undertow | 14 | 2.0.27-1 | vulnerable |
| Debian | undertow | 14 | 2.0.28-1 | vulnerable |
| Debian | undertow | 14 | 2.0.29-1 | vulnerable |
| Debian | undertow | 14 | 2.0.30-1 | vulnerable |
| Debian | undertow | 14 | 2.1.0-1 | vulnerable |
| Debian | undertow | 14 | 2.1.1-1 | vulnerable |
| Debian | undertow | 14 | 2.1.3-1 | vulnerable |
| Debian | undertow | 14 | 2.2.0-1 | vulnerable |
| Debian | undertow | 14 | 2.2.2-1 | vulnerable |
| Debian | undertow | 14 | 2.2.3-1 | vulnerable |
| Debian | undertow | 14 | 2.2.4-1 | vulnerable |
| Debian | undertow | 14 | 2.2.5-1 | vulnerable |
| Debian | undertow | 14 | 2.2.8-1 | vulnerable |
| Debian | undertow | 14 | 2.2.10-1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | undertow | deb | 14 | 2.2.10-1 | Not reported | DEBIAN-CVE-2021-3597 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: