faye-websocket up to 0.10.x Certificate Verification Faye::WebSocket::Client TLS Certificate certificate validation

Summaryinfo

A vulnerability marked as critical has been reported in faye-websocket up to 0.10.x. Affected by this vulnerability is the function Faye::WebSocket::Client of the component Certificate Verification. This manipulation as part of TLS Certificate causes certificate validation. This vulnerability is tracked as CVE-2020-15133. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in faye-websocket up to 0.10.x. Affected by this vulnerability is the function Faye::WebSocket::Client of the component Certificate Verification. The manipulation as part of a TLS Certificate leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The weakness was disclosed 07/31/2020 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2020-15133 since 06/25/2020. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 251153 (Linux Distros Unpatched Vulnerability : CVE-2020-15133), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.11.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (251153). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• faye-websocket

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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