CVE-2021-3629
MEDIUMCVSS 5.9/10EPSS 1.18%
Last modified
CVE-2021-3629 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 1.18% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Integration | All versions |
| Redhat | Jboss Enterprise Application Platform | All versions |
| Redhat | Single Sign-On | All versions |
| Redhat | Undertow | < 2.0.40 |
| Redhat | Undertow | >= 2.2.0, < 2.2.11 |
| Redhat | Wildfly Core | < 17.0 |
| Redhat | Jboss Enterprise Application Platform | 7.4 |
| Redhat | Jboss Enterprise Application Platform | 7.3 |
| Netapp | Active Iq Unified Manager | All versions |
| Netapp | Oncommand Insight | All versions |
| Netapp | Oncommand Workflow Automation | All versions |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1977362Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220729-0008/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1977362Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220729-0008/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3629?
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.
How severe is CVE-2021-3629?
CVE-2021-3629 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3629?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3629?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST