Here at GreyNoise, we’re pretty lucky to see a lot of proof of concepts on the wire as they’re released, but sometimes we have to seek them out ourselves. When CVE-2024-21762, an out-of-bounds write vulnerability in Fortinet FortiOS and FortiProxy, was added to CISA’s Known Exploited Vulnerabilities (KEV) Catalog, it became one such case. With no writeup or proof of concept available, follow along as our researcher h0wdy goes down the rabbit hole to get enough information to develop a detection for our sensors.
If you’re just looking for the tag, you can track Fortinet's CVE-2024-21762 here:
This article is a summary of the full, in-depth version on the GreyNoise Labs blog.
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