CVE-2023-24828 : Security Advisory and Response

This CVE involves the use of a cryptographically weak pseudo-random number generator in Onedev, a self-hosted Git Server with CI/CD and Kanban. Versions prior to 7.9.12 are affected by this vulnerability, which could allow normal users to potentially elevate their privileges to obtain administrator permissions. The issue has been addressed in version 7.9.12, and users are strongly advised to upgrade to mitigate the risk.

Understanding CVE-2023-24828

This section delves into the details of CVE-2023-24828, focusing on the vulnerability in Onedev caused by the use of a cryptographically weak pseudo-random number generator.

What is CVE-2023-24828?

CVE-2023-24828 highlights a security flaw in Onedev where the generation of access tokens and password reset keys in versions prior to 7.9.12 was not cryptographically secure. This weakness could potentially be exploited by users to elevate their permissions within the system.

The Impact of CVE-2023-24828

The impact of this CVE is significant, as it could lead to unauthorized users gaining elevated privileges within Onedev instances. If exploited, this vulnerability could potentially result in security breaches and unauthorized access to sensitive data.

Technical Details of CVE-2023-24828

In this section, we explore the technical aspects of CVE-2023-24828, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in Onedev stemmed from the use of a cryptographically weak pseudo-random number generator, making access tokens and password reset keys susceptible to exploitation by unauthorized users to gain elevated permissions.

Affected Systems and Versions

Onedev versions prior to 7.9.12 are impacted by this vulnerability, with the algorithm used to generate access tokens and password reset keys lacking cryptographic security measures. This flaw could be leveraged by attackers to escalate their privileges within the system.

Exploitation Mechanism

The exploitation of CVE-2023-24828 involves taking advantage of the weak pseudo-random number generator in Onedev to manipulate access tokens and password reset keys, potentially enabling attackers to elevate their permissions within the system.

Mitigation and Prevention

To address the vulnerabilities associated with CVE-2023-24828 and enhance the overall security posture of Onedev instances, users should take immediate steps and adopt long-term security practices.

Immediate Steps to Take

Users are strongly advised to upgrade their Onedev installations to version 7.9.12 or later to mitigate the risks associated with the vulnerability.
Implement strong authentication mechanisms and access controls to prevent unauthorized access to sensitive areas of the system.

Long-Term Security Practices

Regularly monitor and update cryptographic algorithms and random number generators to ensure they meet industry standards for security.
Conduct security assessments and penetration testing to identify and address any vulnerabilities in Onedev and other systems.

Patching and Updates

Stay informed about security updates and patches released by Onedev to address known vulnerabilities promptly.
Establish a robust patch management process to ensure timely deployment of updates and fixes to mitigate security risks.