CVE-2021-3690

    Dashboard / Vulnerabilities / CVE-2021-3690

    CVE-2021-3690

    Published: 23 Aug 2022Last Modified: 9 Jul 2026

    Summary:

    Details: 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.

    References: https://access.redhat.com/security/cve/CVE-2021-3690, https://bugzilla.redhat.com/show_bug.cgi?id=1991299, https://issues.redhat.com/browse/UNDERTOW-1935, https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -225d62735b189e460a56460207b8c6073fcc3737

    Affected versions

    2.0.39.Final
    2.0.38.Final
    2.0.37.Final
    2.0.36.Final
    2.0.35.Final
    2.0.34.Final
    2.0.33.Final
    2.0.32.Final
    2.0.31.Final
    2.0.30.Final
    2.0.29.Final
    2.0.28.Final
    2.0.27.Final
    2.0.26.Final
    2.0.25.Final
    2.0.24.Final
    2.0.23.Final
    2.0.22.Final
    2.0.21.Final
    2.0.20.Final
    2.0.17.Final
    2.0.16.Final
    2.0.15.Final
    2.0.14.Final
    2.0.13.Final
    2.0.12.Final
    2.0.11.Final
    2.0.10.Final
    2.0.9.Final
    2.0.8.Final
    2.0.7.Final
    2.0.6.Final
    2.0.5.Final
    2.0.4.Final
    2.0.3.Final
    2.0.2.Final
    2.0.1.Final
    2.0.0.Final
    2.0.0.Beta1
    2.0.0.Alpha1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-3690 | CVE-DB