Cyber Risks · PortSwigger Research

NTLM Challenge Decoder

Summary: PortSwigger's BApp Store lists NTLM Challenge Decoder, a Burp Suite extension by Louis Dion-Marcil, version 1.1.0, last updated 25 March 2021, that decodes NTLM SSP headers. The listing states that NTLM challenges over HTTP allow decoding of information about a server, and rates the extension's overall system impact as Low.

Why it matters: NTLM challenges sent over HTTP expose server details to anyone who can read the traffic, and this extension exists specifically to decode them - a reminder that NTLM over unencrypted HTTP is still found in the wild and hands out information about the server to whoever is listening.

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Topics
Vulnerabilities & Patching
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