CVE-2020-15134— Faye 信任管理问题漏洞
一分钟漏洞结论
影响对象
faye faye
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Faye是James Coglan软件开发者的一套开源的基于Bayeux协议的发布-订阅消息系统。该系统主要用于在Web客户端之间进行发布-订阅消息传递。 Faye 1.4.0之前版本中存信任管理问题漏洞，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。
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一、 漏洞 CVE-2020-15134 基础信息
漏洞信息
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Vulnerability Title
Missing TLS certificate verification in Faye
来源: CVE Program / CVE List V5
Vulnerability Description
Faye before version 1.4.0, there is a lack of certification validation in TLS handshakes. Faye uses em-http-request and faye-websocket in the Ruby version of its client. Those libraries both use 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 `https:` or `wss:` connection made using these libraries is vulnerable to a man-in-the-middle attack, since it does not confirm the identity of the server it is connected to. The first request a Faye client makes is always sent via normal HTTP, but later messages may be sent via WebSocket. Therefore it is vulnerable to the same problem that these underlying libraries are, and we needed both libraries to support TLS verification before Faye could claim to do the same. Your client would still be insecure if its initial HTTPS request was verified, but later WebSocket connections were not. This is fixed in Faye v1.4.0, which enables verification by default. For further background information on this issue, please see the referenced GitHub Advisory.
来源: 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
来源: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
来源: CVE Program / CVE List V5
Vulnerability Title
Faye 信任管理问题漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Faye是James Coglan软件开发者的一套开源的基于Bayeux协议的发布-订阅消息系统。该系统主要用于在Web客户端之间进行发布-订阅消息传递。 Faye 1.4.0之前版本中存信任管理问题漏洞，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。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2020-15134 的公开POC
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CVE-2020-15134 厂商安全公告 (1)
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https://github.com/faye/faye/security/advisories/GHSA-3q49-h8f9-9fr9 x_refsource_CONFIRM
CVE-2020-15134 安全博客文章 (1)
IV. Related Vulnerabilities
Same product: faye
V. Comments for CVE-2020-15134
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