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Ubuntu 25.04: USN-7564-1 critical: samba access control issue

ubuntu
Calendar Grey June 10, 2025
Dist Ubuntu Esm H88
Ubuntu has issued a security alert about a Samba flaw that could enable unauthorized network access. Users should update to the latest packages to fix this issue
Samba could allow unintended access to network services.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.04 Summary: Samba could allow unintended access to network services. Software Description: - samba: SMB/CIFS file, print, and login server for Unix Details: It was discovered that Samba incorrectly handled certain group membership changes when using Kerberos authentication. A remote user could possibly use this issue to continue to access resources after being removed by an administrator.

Topics%20covered

Topics Covered

security advisory access control samba Ubuntu authentication issue network services

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.04 samba 2:4.21.4+dfsg-1ubuntu3.1 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7564-1

CVE-2025-0620

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7564-1

Topics%20covered

Topics Covered

security advisory access control samba Ubuntu authentication issue network services

Package Information

https://launchpad.net/ubuntu/+source/samba/2:4.21.4+dfsg-1ubuntu3.1

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