CVE-2021-3690
HIGHCVSS 7.5/10EPSS 1.38%
Last modified
CVE-2021-3690 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. EPSS estimates a 1.38% chance of exploitation in the next 30 days.
Description
A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Fuse | 1.0 |
| Redhat | Integration Camel K | All versions |
| Redhat | Integration Camel Quarkus | All versions |
| Redhat | Jboss Enterprise Application Platform | All versions |
| Redhat | Openshift Application Runtimes | All versions |
| Redhat | Single Sign-On | All versions |
| Redhat | Undertow | < 2.0.40 |
| Redhat | Undertow | >= 2.1.0, < 2.2.10 |
| Redhat | Jboss Enterprise Application Platform | 7.3 |
| Redhat | Jboss Enterprise Application Platform | 7.4 |
References
- https://access.redhat.com/security/cve/CVE-2021-3690Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1991299Issue Tracking, Vendor Advisory
- https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877Patch, Third Party Advisory
- https://issues.redhat.com/browse/UNDERTOW-1935Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2021-3690Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1991299Issue Tracking, Vendor Advisory
- https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877Patch, Third Party Advisory
- https://issues.redhat.com/browse/UNDERTOW-1935Exploit, Issue Tracking, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3690?
A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.
How severe is CVE-2021-3690?
CVE-2021-3690 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3690?
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.
Are you affected by CVE-2021-3690?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST