CVE Vulnerability

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.

5.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

8.7 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://blog.jcoglan.com/2020/07/31/missing-tls-verification-in-faye/ Exploit Third Party Advisory
https://github.com/faye/faye-websocket-ruby/security/advisories/GHSA-2v5c-755p-p4gv Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:faye-websocket_project:faye-websocket:*:*:*:*:*:*:*:*
Information

Published : 2020-07-31 06:15

Updated : 2021-11-18 06:28

NVD link : CVE-2020-15133

Mitre link : CVE-2020-15133

Products Affected
No products.
CWE
CWE-295

Improper Certificate Validation