A SSSD security update has been released for Ubuntu Linux 20.04 LTS.

[USN-6156-1] SSSD vulnerability

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Ubuntu Security Notice USN-6156-1
June 12, 2023

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

- Ubuntu 20.04 LTS

Summary:

SSSD could allow unintended access to network services.

Software Description:
- sssd: System Security Services Daemon

Details:

It was discovered that SSSD incorrrectly sanitized certificate data used in
LDAP filters. When using this issue in combination with FreeIPA, a remote
attacker could possibly use this issue to escalate privileges.

Update instructions:

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

Ubuntu 20.04 LTS:
sssd 2.2.3-3ubuntu0.11

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

References:
https://ubuntu.com/security/notices/USN-6156-1
CVE-2022-4254

Package Information:
https://launchpad.net/ubuntu/+source/sssd/2.2.3-3ubuntu0.11