Vulnerability in Linux Kernel's ksmbd Component Affects User Authentication

CVE-2023-32251

What is CVE-2023-32251?

A vulnerability has been identified in the Linux kernel's ksmbd component, which serves as the kernel's SMB/CIFS server. The security mechanism aimed at throttling session setup to prevent dictionary attacks, by imposing a 5-second delay, can be circumvented using asynchronous requests. This flaw undermines the effectiveness of the anti-brute-force protection, enabling attackers to launch dictionary attacks with improved efficiency against user credentials and various authentication processes.

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