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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2020-15133)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2020-15133)

ID	Name	Product	Family	Severity
251153	Linux Distros Unpatched Vulnerability : CVE-2020-15133	Nessus	Misc.	high
409098	SCA: security update for faye-websocket (GHSA-2v5c-755p-p4gv)	Tenable Cloud Security	SCA Checks	high
409098	SCA: security update for faye-websocket (GHSA-2v5c-755p-p4gv)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2020-15133

high

Tenable Plugins

high

high

high