PT-2023-20955 · Netgate · Pfsense Ce+1

Fabien Maisonnette · Published 2023-03-22 · Updated 2025-02-25 · CVE-2023-27100

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions pfSense Plus software version 22.05.1 pfSense CE software version 2.6.0

Description The issue is related to improper restriction of excessive authentication attempts in the SSHGuard component, allowing attackers to bypass brute force protection mechanisms via crafted web requests.

Recommendations For pfSense Plus software version 22.05.1, update to a version that includes a fix for this issue. For pfSense CE software version 2.6.0, update to a version that includes a fix for this issue. As a temporary workaround, consider restricting access to the SSHGuard component to minimize the risk of exploitation.

Exploit

Fix

Improper Restriction of Excessive Authentication Attempts

Weakness Enumeration

CWE-307

Related Identifiers

CVE-2023-27100

Affected Products

Pfsense Ce

Pfsense Plus

References · 10

• 🔥 https://exploit-db.com/exploits/51352 · Exploit
• 🔥 https://packetstorm.news/files/id/171791 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-27100 · Security Note
• https://redmine.pfsense.org/issues/13574 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-27100 · Vendor Advisory
• https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc · Vendor Advisory
• https://t.me/cibsecurity/60539 · Telegram Post
• https://t.me/cvenotify/46685 · Telegram Post
• https://t.me/cvenotify/112491 · Telegram Post
• http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html · Note