CVE-2023-27100 EXPLOIT
9.8
CRITICAL · CVSS 3.1 · EPSS 9.8% (pctl 95)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 9.84% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-307 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2023-03-22 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| netgate | pfsense plus |
| pfsense | pfsense |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | pfsenseCE v2.6.0 - Anti-brute force protection bypass | 2023-04-08 |
References
- http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html
- https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc
- https://redmine.pfsense.org/issues/13574
- http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html
- https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc
- https://redmine.pfsense.org/issues/13574
- https://packetstorm.news/files/id/171791
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