CVE-2024-45237: fort-validator Buffer Overflow — Fix

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.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-120 CWE-120

Affected Products

Vendor	Product	Versions
nicmx	fort-validator	< 1.6.3

References

Advisories & Patches

https://nicmx.github.io/FORT-validator/CVE.html

Other References

https://lists.debian.org/debian-lts-announce/2025/02/msg00030.html

Frequently Asked Questions

What is CVE-2024-45237? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2024-45237? +

CVE-2024-45237 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2024-45237? +

CVE-2024-45237 affects products from nicmx, specifically: fort-validator. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-45237? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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