CVE-2023-5207
📋 TL;DR
This vulnerability allows authenticated attackers in GitLab to execute arbitrary CI/CD pipelines under another user's context, potentially accessing sensitive data or performing unauthorized actions. It affects GitLab Community Edition (CE) and Enterprise Edition (EE) installations with specific version ranges. All organizations running affected GitLab versions are at risk.
💻 Affected Systems
- GitLab Community Edition
- GitLab Enterprise Edition
📦 What is this software?
Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →⚠️ Risk & Real-World Impact
Worst Case
An attacker could execute malicious pipelines to exfiltrate sensitive data, deploy malicious code, or compromise the entire GitLab instance and connected systems.
Likely Case
Attackers could access sensitive repository data, deploy unauthorized code, or manipulate CI/CD processes to gain persistent access.
If Mitigated
With proper access controls and monitoring, impact is limited to unauthorized pipeline execution within the attacker's existing permissions scope.
🎯 Exploit Status
Requires authenticated access to GitLab. The vulnerability is documented in multiple GitLab issues and HackerOne reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 16.2.8, 16.3.5, or 16.4.1
Vendor Advisory: https://gitlab.com/gitlab-org/gitlab/-/issues/425604
Restart Required: Yes
Instructions:
1. Backup your GitLab instance. 2. Update to GitLab 16.2.8, 16.3.5, or 16.4.1 using your package manager. 3. Restart GitLab services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict Pipeline Permissions
allLimit pipeline execution permissions to trusted users only
Disable CI/CD for Non-Essential Projects
allTemporarily disable CI/CD pipelines for projects not requiring immediate automation
🧯 If You Can't Patch
- Implement strict access controls and monitor all pipeline executions
- Isolate GitLab instance from production networks and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check GitLab version via admin interface or command line. If version falls within affected ranges, system is vulnerable.Check Version:
sudo gitlab-rake gitlab:env:info | grep 'Version:'Verify Fix Applied:
Confirm GitLab version is 16.2.8, 16.3.5, or 16.4.1 or higher.📡 Detection & Monitoring
Log Indicators:
- Unusual pipeline executions from unexpected users
- Pipelines running with elevated permissions
- Multiple failed authentication attempts followed by pipeline execution
Network Indicators:
- Unusual outbound connections from GitLab runners
- Unexpected artifacts being downloaded during pipeline execution
SIEM Query:
source="gitlab" AND (event="pipeline_start" OR event="pipeline_finish") | stats count by user, project | where count > threshold