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Improper Access Control Affecting faye package, versions <1.0.4 >=1.1.0, <1.1.3 >=1.2.0, <1.2.5

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.39% (73rd percentile)
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NVD
9.8 critical

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  • Snyk ID SNYK-RUBY-FAYE-567760
  • published 28 Apr 2020
  • disclosed 28 Apr 2020
  • credit Unknown
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Introduced: 28 Apr 2020

CVE-2020-11020 Open this link in a new tab
CWE-284 Open this link in a new tab

How to fix?

Upgrade faye to version 1.0.4, 1.1.3, 1.2.5 or higher.

Overview

faye is a simple pub/sub messaging for the web.

Affected versions of this package are vulnerable to Improper Access Control. The Server parses channels in a way that means any channel namespaced under /meta/subscribe will also work as a subscription request. For example if the client sends a message to the channel /meta/subscribe/x, that will bypass most authentication extensions but will still be interpreted by the server as a subscription request, and the client will be subscribed to the requested channel. The client has thus bypassed the user's access control policy.

References