Samba: CVE-2022-42898 Critical: Remote Code Execution Risk Mitigated

Samba this week released patches for an integer overflow vulnerability that could potentially lead to arbitrary code execution.

An open source Server Message Block (SMB) implementation for Linux and Unix systems, Samba can be used as an Active Directory Domain Controller (AD DC).

Tracked as CVE-2022-42898 and impacting multiple Samba releases, the newly addressed security defect exists in the Service for User to Proxy (S4U2proxy) handler, which provides “a service that obtains a service ticket to another service on behalf of a user.”

Also referred to as ‘constrained delegation’, the feature relies on request and response messages from the Kerberos ticket-granting service (TGS) exchange. Heimdal and MIT Kerberos libraries in Samba ensure Kerberos support and implement the Key Distribution Center (KDC).

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