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`WebSocketClient` does not perform SSL hostname validation

High
TooTallNate published GHSA-gw55-jm4h-x339 May 6, 2020

Package

maven org.java-websocket:Java-WebSocket (Maven)

Affected versions

<= 1.4.1

Patched versions

1.5.0

Description

Vulnerability

The Java-WebSocket Client does not perform hostname verification.

  • This means that SSL certificates of other hosts are accepted as long as they are trusted.
    To exploit this vulnerability an attacker has to perform a man-in-the-middle (MITM) attack between a Java application using the Java-WebSocket Client and an WebSocket server it's connecting to.
  • TLS normally protects users and systems against MITM attacks, it cannot if certificates from other trusted hosts are accepted by the client.

For more information see: CWE-297: Improper Validation of Certificate with Host Mismatch.

Discovered by: Peter Stöckli (using a custom CodeQL query)

Important note

The OWASP Dependency-Check may report that a dependency of your project is affected by this security vulnerability, but you don't use this lib.
This is caused by the fuzzy search in the OWASP implementation.
Check out this issue for more information and a way to suppress the warning.

Severity

High

CVE ID

CVE-2020-11050

Weaknesses

No CWEs

Credits