[USN-7394-1] Doorkeeper vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-7394-1
March 31, 2025

ruby-doorkeeper vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in ruby-doorkeeper.

Software Description:
- ruby-doorkeeper: OAuth 2 provider for Rails and Grape

Details:

Jonathan Clem and Justin Bull discovered that Doorkeeper could allow
arbitrary token revocation and replay attacks. An attacker could possibly
use this issue to gain unauthorized access to a system. (CVE-2016-6582)

It was discovered that Doorkeeper incorrectly handled storing client names.
An attacker could possibly use this issue to execute a cross-site
scripting (XSS) attack. (CVE-2018-1000088)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS
  ruby-doorkeeper                 2.2.1-1ubuntu0.1~esm2
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-7394-1
  CVE-2016-6582, CVE-2018-1000088