CVE-2023-37267 : Vulnerability Insights and Analysis

Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions.

Understanding CVE-2023-37267

Umbraco, an ASP.NET CMS, contains a vulnerability that could potentially grant admin-level permissions to unauthorized users under specific restart conditions.

What is CVE-2023-37267?

CVE-2023-37267 highlights an improper access control flaw in Umbraco, enabling unauthorized access to administrative functions after a restart.

The Impact of CVE-2023-37267

The vulnerability poses a high risk, affecting the confidentiality, integrity, and availability of the Umbraco CMS system.

Technical Details of CVE-2023-37267

The vulnerability has a CVSS v3.1 Base Score of 7.5 (High severity) with an attack complexity of HIGH and attack vector via NETWORK.

Vulnerability Description

Improper access control in Umbraco allows unauthorized users to gain admin-level access after specific system restart conditions.

Affected Systems and Versions

Umbraco-CMS versions >= 9.0.0, < 10.6.1
Umbraco-CMS versions >= 11.0.0, < 11.4.2
Umbraco-CMS version = 12.0.0 All these versions are affected by this vulnerability.

Exploitation Mechanism

Under certain conditions, restarting Umbraco can lead to unauthorized users gaining access to admin-level privileges without proper authentication.

Mitigation and Prevention

To address CVE-2023-37267, immediate action and long-term security practices are crucial.

Immediate Steps to Take

Users are advised to update Umbraco to versions 10.6.1, 11.4.2, or 12.0.1 to mitigate the vulnerability.

Long-Term Security Practices

Implement strict access control policies, conduct regular security audits, and stay informed about software updates and patches.

Patching and Updates

Regularly monitor vendor security advisories and apply patches promptly to prevent exploitation of known vulnerabilities.