CVE-2020-24383

Name: CVE-2020-24383
Creator: NVD / NIST
Published: 2020-12-11T23:15:14.213+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 4.79%

Last modified Jun 17, 2026

CVE-2020-24383 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. An issue was discovered in FNET through 4.6.4. The code for processing resource records in mDNS queries doesn't check for proper '\0' termination of the resource record name string, leading to an out-of-bounds read, and potentially causing information leak or Denial-or-Service.. EPSS estimates a 4.79% chance of exploitation in the next 30 days.

Description

An issue was discovered in FNET through 4.6.4. The code for processing resource records in mDNS queries doesn't check for proper '\0' termination of the resource record name string, leading to an out-of-bounds read, and potentially causing information leak or Denial-or-Service.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

4.79%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Butok	Fnet	<= 4.6.4

References

https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource

Timeline

Published: Dec 11, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24383?

How severe is CVE-2020-24383?

CVE-2020-24383 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 4.79% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24383?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-24383?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST