CVE-2023-27100 : What You Need to Know

This CVE record was published on March 22, 2023, and involves the 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. Attackers can bypass brute force protection mechanisms through crafted web requests.

Understanding CVE-2023-27100

This section will delve into what CVE-2023-27100 entails, its impact, technical details, and mitigation strategies.

What is CVE-2023-27100?

CVE-2023-27100 refers to the vulnerability present in the SSHGuard component of Netgate pfSense Plus and pfSense CE software that allows attackers to circumvent brute force protection mechanisms.

The Impact of CVE-2023-27100

The impact of this vulnerability is significant as it enables attackers to bypass security measures intended to prevent brute force attacks. This could lead to unauthorized access to systems and sensitive information, posing a serious risk to the security of affected systems.

Technical Details of CVE-2023-27100

In this section, we will explore the technical aspects of CVE-2023-27100, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from the improper restriction of excessive authentication attempts in the SSHGuard component, which can be exploited by attackers through carefully crafted web requests.

Affected Systems and Versions

The affected systems include Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0. Users of these versions are at risk of being targeted through this vulnerability.

Exploitation Mechanism

Attackers exploit the vulnerability by sending specially crafted web requests, allowing them to bypass the brute force protection mechanisms and potentially gain unauthorized access to the targeted systems.

Mitigation and Prevention

Mitigating CVE-2023-27100 is crucial to safeguard systems from potential exploitation. Implementing immediate steps, adopting long-term security practices, and staying updated with patches are essential.

Immediate Steps to Take

Users should consider implementing additional security measures, monitoring authentication attempts, and restricting access to vulnerable components to mitigate the risk posed by CVE-2023-27100.

Long-Term Security Practices

In the long term, organizations should focus on improving overall security posture, conducting regular security assessments, and providing training on secure practices to prevent similar vulnerabilities from being exploited.

Patching and Updates

Netgate pfSense Plus and pfSense CE software users should apply relevant patches and updates provided by the vendor to address CVE-2023-27100 and enhance the security of their systems.