CVE-2019-19312 : Vulnerability Insights and Analysis

GitLab EE versions 8.14 through 12.5, 12.4.3, and 12.3.6 are affected by an Incorrect Access Control vulnerability that allows forked repositories to access private project information through the API.

Understanding CVE-2019-19312

This CVE identifies a security flaw in GitLab EE versions that impacts the access control system, potentially exposing private project data.

What is CVE-2019-19312?

The vulnerability in GitLab EE versions 8.14 through 12.5, 12.4.3, and 12.3.6 allows forked repositories created before a project is marked as private to still access sensitive information via the API.

The Impact of CVE-2019-19312

The vulnerability poses a risk of unauthorized access to private project data, compromising confidentiality and potentially leading to data leaks or unauthorized use of sensitive information.

Technical Details of CVE-2019-19312

GitLab EE versions 8.14 through 12.5, 12.4.3, and 12.3.6 are susceptible to the following:

Vulnerability Description

The flaw in the access control system allows previously forked repositories to retrieve information about private projects even after they have been marked as private.

Affected Systems and Versions

GitLab EE versions 8.14 through 12.5
GitLab EE versions 12.4.3 and 12.3.6

Exploitation Mechanism

Attackers with access to forked repositories created before a project's privacy settings were changed can exploit this vulnerability to access private project data through the API.

Mitigation and Prevention

To address CVE-2019-19312, follow these steps:

Immediate Steps to Take

Upgrade GitLab EE to a patched version that addresses the access control issue.
Review and update project access settings to ensure sensitive information is protected.

Long-Term Security Practices

Regularly review and audit repository access controls to prevent unauthorized access.
Educate users on proper forking and access control practices to mitigate similar vulnerabilities.

Patching and Updates

Apply security patches provided by GitLab promptly to mitigate the vulnerability and enhance system security.