CVE-2021-3690
highEPSS 0.018 · 78 %ileDEEUUSEPSS · scored 2026-10-17
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (14)
Products and version ranges known to be affected.
- redhat integration camel quarkusall versionsnvdUScpe:2.3:a:redhat:integration_camel_quarkus:*:*:*:*:*:*:*:*
- redhat jboss enterprise application platformall versionsnvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
- redhat jboss enterprise application platform= 7.3nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
- redhat jboss enterprise application platform= 7.4nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
- redhat openshift application runtimesall versionsnvdUScpe:2.3:a:redhat:openshift_application_runtimes:*:*:*:*:*:*:*:*
advisories (4)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2022-0916Red Hat JBoss Enterprise Application Platform: Mehrere SchwachstellenDeutsch2021-09-08csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in der Red Hat JBoss Enterprise Application Platform ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial of Service Zustand auszulösen und vertrauliche Informationen offenzulegen.
- WID-SEC-W-2025-0888Red Hat JBoss Enterprise Application Platform: Schwachstelle ermöglicht Denial of ServiceDeutsch2021-08-18csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat JBoss Enterprise Application Platform ausnutzen, um einen Denial of Service Angriff durchzuführen.
- WID-SEC-W-2025-1459Dell Data Protection Advisor: Mehrere SchwachstellenDeutsch2025-07-03csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell Data Protection Advisor ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, und um weitere nicht näher spezifizierte Angriffe durchzuführen.
- GHSA-fj7c-vg2v-ccrmUndertow vulnerable to memory exhaustion due to buffer leak2022-07-15ghsa · osvUS
Buffer leak on incoming WebSocket PONG message(s) in Undertow before 2.0.40 and 2.2.10 can lead to memory exhaustion and allow a denial of service.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (31)
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2021:3216Patchcnnvd
- https://access.redhat.com/security/cve/CVE-2021-3690cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=1991299cnnvd
- https://cxsecurity.com/cveshow/CVE-2021-3690/cnnvd
- https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877cnnvd
- https://issues.redhat.com/browse/UNDERTOW-1935cnnvd
- https://packetstormsecurity.com/files/163883/Red-Hat-Security-Advisory-2021-3216-01.htmlcnnvd
- https://packetstormsecurity.com/files/164077/Red-Hat-Security-Advisory-2021-3471-01.htmlcnnvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan