Authentication Bypass Affecting package, versions >=2.4.0-rc1 <2.6.1

  • Attack Complexity


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  • snyk-id


  • published

    26 Apr 2021

  • disclosed

    26 Apr 2021

  • credit


How to fix?

Upgrade to version 2.6.1 or higher.

Overview is a modern, experimental IRC server written in Go.

Affected versions of this package are vulnerable to Authentication Bypass via the REGISTER command. The REGISTER command was allowed before connection registration, allowing unauthenticated users to REGISTER and then take advantage of skip-server-password.

The main vulnerability here is for configurations that enable server.password (not a default) and leave accounts.registration.allow-before-connect enabled (a default). The issue appears to have originated in v.2.4.0-rc1.