Netgate pfSense Plus/pfSense CE SSHGuard protection mechanism

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Netgate pfSense Plus and pfSense CE and classified as problematic. The affected element is an unknown function of the component SSHGuard. The manipulation leads to protection mechanism. This vulnerability is referenced as CVE-2023-27100. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Netgate pfSense Plus and pfSense CE (Firewall Software) (the affected version unknown). This issue affects an unknown part of the component SSHGuard. The manipulation with an unknown input leads to a protection mechanism vulnerability. Using CWE to declare the problem leads to CWE-693. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. Impacted is confidentiality. The summary by CVE is:

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.

The weakness was published 03/23/2023 as 13574. The advisory is shared at redmine.pfsense.org. The identification of this vulnerability is CVE-2023-27100 since 02/27/2023. Technical details are unknown but a public exploit is available.

The exploit is available at packetstormsecurity.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (51352) and EUVD (EUVD-2023-30884). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Protection mechanism
CWE: CWE-693
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/27/2023 🔍
03/23/2023 +24 days 🔍
03/23/2023 +0 days 🔍
11/15/2025 +968 days 🔍

Sourcesinfo

Advisory: 13574
Status: Confirmed

CVE: CVE-2023-27100 (🔍)
GCVE (CVE): GCVE-0-2023-27100
GCVE (VulDB): GCVE-100-223625
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/23/2023 07:35
Updated: 11/15/2025 08:43
Changes: 03/23/2023 07:35 (38), 04/13/2023 08:07 (11), 11/09/2023 13:07 (1), 06/19/2024 03:06 (22), 07/03/2024 21:34 (1), 11/15/2025 08:43 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

 Anonymous User (+0)
3 years ago
Good morning,
Could you align to the official NVD Nist cpe "cpe:2.3:a:pfsense:pfsense" for CE (Community Edition)?
We would appreciate it very much.
Best regards,
CERT Team
 VulDB Community Team3 years ago
Thank you, we have just aligned the CPE.

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