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IPSEC/L2TP with Radius and CVE-2024-3596

Dieter

Hello,

with the patch from Microsoft KB5040434 07/2024 there are problems with Radius authentication for L2TP.

Without the patch, the client connection works without any problems.

What can we do?

Best Regards

Dieter



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  • 0 in reply to Vivek Jagad

    Hi Vivek,

    we have the same issue with our Sophos Firewalls and Windows NPS Server with RADIUS authentication. With installed Windows Update KB5040437 (Server 2022) and KB5040430 (Server 2019) RADIUS authentication is not working. As a workaround I deinstalled the Update in the NPS Server and it is working again. 

    I will also open a ticket for this issue. 

    BR,

    Ben

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to Vivek Jagad

    We also experienced this issue with Server 2022 and the KB5040437 update. Existing users could still authenticate. New users could authenticate but the Group name attribute wouldn't be parsed.

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