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Ubuntu Security Notice USN-6571-1
January 09, 2024
monit vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS (Available with Ubuntu Pro)
- Ubuntu 20.04 LTS (Available with Ubuntu Pro)
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)
Summary:
Monit could be made to bypass authentication checks for disabled accounts.
Software Description:
- monit: utility for monitoring and managing daemons or similar programs
Details:
Youssef Rebahi-Gilbert discovered that Monit did not properly process
credentials for disabled accounts. An attacker could possibly use this
issue to login to the platform with an expired account and a valid
password.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS (Available with Ubuntu Pro):
   monit                           1:5.31.0-1ubuntu0.1~esm1
Ubuntu 20.04 LTS (Available with Ubuntu Pro):
   monit                           1:5.26.0-4ubuntu0.1~esm1
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   monit                           1:5.25.1-1ubuntu0.1~esm2
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   monit                           1:5.16-2ubuntu0.2+esm2
Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   monit                           1:5.6-2ubuntu0.1+esm3
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6571-1
   CVE-2022-26563