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CVE-2020-15133— Missing TLS certificate verification in Faye Websocket

Quick assessment

Affected
faye faye-websocket
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

faye-websocket是一款WebSocket实现，它主要提供WebSocket服务器和客户端等。 faye-websocket 0.11.0之前版本中存在信任管理问题漏洞，该漏洞源于在TLS握手过程中，程序没有进行证书检查。攻击者可利用该漏洞实施中间人攻击。

CVSS 8.0 · High EPSS 0.92% · P60
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I. Basic Information for CVE-2020-15133

Vulnerability Information
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Vulnerability Title
Missing TLS certificate verification in Faye Websocket
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
faye-websocket 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
faye-websocket是一款WebSocket实现，它主要提供WebSocket服务器和客户端等。 faye-websocket 0.11.0之前版本中存在信任管理问题漏洞，该漏洞源于在TLS握手过程中，程序没有进行证书检查。攻击者可利用该漏洞实施中间人攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
faye faye-websocket < 0.11.0 -

II. Public POCs for CVE-2020-15133

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III. Intelligence Information for CVE-2020-15133

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Vendor Advisories for CVE-2020-15133 (1)

Security Blog Posts for CVE-2020-15133 (1)

IV. Related Vulnerabilities

Same vendor: faye
Same weakness: CWE-295