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CVE-2021-3690

Good to know:

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Date: August 23, 2022

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.

Language: Java

Severity Score

Related Resources (7)

https://bugzilla.redhat.com/show_bug.cgi?id=1991299
https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877
https://nvd.nist.gov/vuln/detail/CVE-2021-3690
https://access.redhat.com/security/cve/CVE-2021-3690
https://security-tracker.debian.org/tracker/CVE-2021-3690
https://issues.redhat.com/browse/UNDERTOW-1935
https://www.mend.io/vulnerability-database/CVE-2021-3690

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Missing Release of Memory after Effective Lifetime

CWE-401

Top Fix

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Upgrade Version

Upgrade to version io.undertow:undertow-websockets-jsr:2.0.40.Final, 2.2.10.Final

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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