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


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.52% (77th percentile)

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  • Snyk IDSNYK-RUBY-FAYE-567760
  • published28 Apr 2020
  • disclosed28 Apr 2020
  • creditUnknown

Introduced: 28 Apr 2020

CVE-2020-11020  (opens in a new tab)
CWE-284  (opens 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

CVSS Scores

version 3.1