Ubuntu 20.04: USN-6425-2 Critical: Samba Regression Issues

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS Summary: USN-6425-1 introduced a regression in Samba. Software Description: - samba: SMB/CIFS file, print, and login server for Unix Details: USN-6425-1 fixed vulnerabilities in Samba. Due to a build issue on Ubuntu 20.04 LTS, the update introduced regressions in macro handling and possibly other functionality. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Sri Nagasubramanian discovered that the Samba acl_xattr VFS module incorrectly handled read-only files. When Samba is configured to ignore system ACLs, a remote attacker could possibly use this issue to truncate read-only files. (CVE-2023-4091) Andrew Bartlett discovered that Samba incorrectly handled the DirSync control. A remote attacker with an RODC DC account could possibly use this issue to obtain all domain secrets. (CVE-2023-4154) A...