CVE-2018-20799

Name: CVE-2018-20799
Creator: NVD / NIST
Published: 2019-03-01T15:29:00.327+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.59%

Last modified Jun 17, 2026

CVE-2018-20799 is a vulnerability of currently unknown severity. In pfSense 2.4.4_1, blocking of source IP addresses on the basis of failed HTTPS authentication is inconsistent with blocking of source IP addresses on the basis of failed SSH authentication (the behavior does not match the sshguard documentation), which might make it easier for attackers to bypass intended access restrictions.. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

Description

In pfSense 2.4.4_1, blocking of source IP addresses on the basis of failed HTTPS authentication is inconsistent with blocking of source IP addresses on the basis of failed SSH authentication (the behavior does not match the sshguard documentation), which might make it easier for attackers to bypass intended access restrictions.

Metrics

EPSS Probability

1.59%

72.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Netgate	Pfsense	2.4.4	P1

References

https://redmine.pfsense.org/issues/9223Exploit, Issue Tracking, Patch, Vendor Advisory
https://redmine.pfsense.org/issues/9223Exploit, Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Mar 1, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20799?

How severe is CVE-2018-20799?

Severity scoring for CVE-2018-20799 is pending analysis. The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20799?

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-2018-20799?

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

Scan your code now

Source: NVD / NIST