CVE-2018-17452
📋 TL;DR
This Server-Side Request Forgery (SSRF) vulnerability in GitLab allows attackers to make the server send requests to internal network services via loopback addresses. It affects GitLab Community and Enterprise Edition installations with specific versions, potentially exposing internal services to unauthorized access.
💻 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
Attackers could access sensitive internal services, exfiltrate data, or pivot to other systems within the network, potentially leading to full network compromise.
Likely Case
Unauthorized access to internal services running on loopback interfaces, potentially exposing configuration data, credentials, or other sensitive information.
If Mitigated
Limited impact with proper network segmentation and access controls, though internal services remain at risk.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 11.1.7, 11.2.4, or 11.3.1
Vendor Advisory: https://about.gitlab.com/releases/2018/10/01/security-release-gitlab-11-dot-3-dot-1-released/
Restart Required: Yes
Instructions:
1. Backup your GitLab installation and database. 2. Update to GitLab 11.1.7, 11.2.4, or 11.3.1 using your package manager. 3. Restart GitLab services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Network Segmentation
allRestrict GitLab server's network access to internal services using firewall rules.
🧯 If You Can't Patch
- Implement strict network access controls to limit GitLab server's ability to reach internal services
- Monitor for unusual outbound connections from GitLab to internal IP addresses
🔍 How to Verify
Check if Vulnerable:
Check GitLab version via admin interface or command line. If version is before 11.1.7, 11.2.x before 11.2.4, or 11.3.x before 11.3.1, the system is vulnerable.Check Version:
sudo gitlab-rake gitlab:env:info | grep 'GitLab version'Verify Fix Applied:
Confirm GitLab version is 11.1.7, 11.2.4, or 11.3.1 or later.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from GitLab to internal IP addresses
- Failed authentication attempts followed by SSRF attempts
Network Indicators:
- HTTP requests from GitLab server to internal services on loopback addresses
- Unusual traffic patterns from GitLab to non-standard ports
SIEM Query:
source="gitlab" AND (dest_ip=127.0.0.1 OR dest_ip=::1 OR dest_ip=localhost) AND http_request