CVE-2024-45237

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-08-24 · updated 2026-06-17
Weakness: CWE-120

Description

An issue was discovered in Fort before 1.6.3. A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a resource certificate containing a Key Usage extension composed of more than two bytes of data. Fort writes this string into a 2-byte buffer without properly sanitizing its length, leading to a buffer overflow.

Affected products

NICMx Fort-Validator: before 1.6.3 — fixed in 1.6.3

How to fix

Upgrade to a fixed version: NICMx Fort-Validator 1.6.3. Check the vendor advisory for mitigations.

References

https://nicmx.github.io/FORT-validator/CVE.html
https://lists.debian.org/debian-lts-announce/2025/02/msg00030.html

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