CVE-2023-27100

CRITICAL EPSS 95.0%

Published Mar 22, 20233y ago · Modified Jun 17, 20261w ago

9.8 CVSS 3.1

Critical

Published Mar 22, 2023 3y ago

Last Modified Jun 17, 2026 1w ago

Description

Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.

CVSS Details

Base Score

9.8

Exploitability

3.9

Impact

5.9

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

EPSS Exploit Probability

95.0% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-307

Affected Products 2

Vendor	Product	Version	Range
netgate	pfsense_plus	22.05.1	any
pfsense	pfsense	2.6.0	any

References 4

packetstormsecurity.com http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html
docs.netgate.com https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc

Vendor Advisory
packetstorm.news https://packetstorm.news/files/id/171791
redmine.pfsense.org https://redmine.pfsense.org/issues/13574

Issue TrackingPatchVendor Advisory

Remediation

redmine.pfsense.org https://redmine.pfsense.org/issues/13574

Issue TrackingPatchVendor Advisory