CVE-2022-20208: 
NixOS vulnerability analysis and mitigation

A vulnerability was identified in cifs-utils affecting versions before 6.13. The vulnerability, tracked as CVE-2021-20208, involves incorrect handling of host credentials when mounting a krb5 CIFS file system from within a container (Ubuntu Security).

The vulnerability exists in the credential handling mechanism of cifs-utils when mounting krb5 CIFS file systems within containerized environments. This security flaw allows the system to incorrectly use host credentials during the mounting process (Ubuntu Security).

When exploited, this vulnerability could allow an attacker inside a container to potentially gain access to sensitive information. The issue specifically affects the security boundary between containers and their host systems (Ubuntu Security Notice).

The vulnerability has been addressed in cifs-utils version 6.13 and later. Ubuntu has released security updates for affected versions: Ubuntu 22.04 (2:6.14-1ubuntu0.1), Ubuntu 21.10 (2:6.11-3.1ubuntu0.1), Ubuntu 20.04 (2:6.9-1ubuntu0.2), and Ubuntu 18.04 (2:6.8-1ubuntu1.2). Users are advised to update their systems to the patched versions (Ubuntu Security Notice).