Vulnerability Details CVE-2020-15133
In faye-websocket before version 0.11.0, there is a lack of certification validation in TLS handshakes. The `Faye::WebSocket::Client` class uses the `EM::Connection#start_tls` method in EventMachine to implement the TLS handshake whenever a `wss:` URL is used for the connection. This method does not implement certificate verification by default, meaning that it does not check that the server presents a valid and trusted TLS certificate for the expected hostname. That means that any `wss:` connection made using this library is vulnerable to a man-in-the-middle attack, since it does not confirm the identity of the server it is connected to. For further background information on this issue, please see the referenced GitHub Advisory. Upgrading `faye-websocket` to v0.11.0 is recommended.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 35.7%
CVSS Severity
CVSS v3 Score 8.0
CVSS v2 Score 5.8
References
- https://blog.jcoglan.com/2020/07/31/missing-tls-verification-in-faye/
- https://github.com/faye/faye-websocket-ruby/security/advisories/GHSA-2v5c-755p-p4gv
- https://blog.jcoglan.com/2020/07/31/missing-tls-verification-in-faye/
- https://github.com/faye/faye-websocket-ruby/security/advisories/GHSA-2v5c-755p-p4gv
Products affected by CVE-2020-15133
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.1.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.1.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.1.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.10.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.2.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.2.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.2.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.3.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.3.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.3.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.3.3
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.3.4
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.3.5
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.3.6
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.4.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.4.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.4.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.4.3
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.4.4
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.5.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.5.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.5.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.5.3
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.5.4
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.6.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.6.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.6.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.6.3
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.6.4
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.6.5
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.7.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.7.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.7.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.7.3
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.8.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.8.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.9.0
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.9.1
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.9.2
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.9.3
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cpe:2.3:a:faye-websocket_project:faye-websocket:0.9.4