CVE-2024-4557
📋 TL;DR
This vulnerability allows attackers to cause Denial of Service (DoS) conditions in GitLab instances by exploiting resource exhaustion in the banzai pipeline. All GitLab CE/EE installations running affected versions are vulnerable. Attackers can degrade or crash GitLab services by sending specially crafted requests.
💻 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
Complete service unavailability of GitLab instance, disrupting all Git operations, CI/CD pipelines, and collaboration features for extended periods.
Likely Case
Performance degradation, intermittent service disruptions, and increased resource consumption leading to slower response times.
If Mitigated
Minimal impact with proper rate limiting, resource monitoring, and network segmentation in place.
🎯 Exploit Status
The vulnerability requires sending requests to trigger banzai pipeline processing but doesn't require authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 16.11.5, 17.0.3, or 17.1.1
Vendor Advisory: https://gitlab.com/gitlab-org/gitlab/-/issues/460517
Restart Required: Yes
Instructions:
1. Backup your GitLab instance. 2. Update to GitLab 16.11.5, 17.0.3, or 17.1.1 using your package manager. 3. Restart GitLab services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Rate Limiting
allImplement rate limiting on GitLab endpoints to prevent resource exhaustion attacks.
Configure rate limiting in GitLab configuration file (gitlab.rb) or via reverse proxy settings
Network Segmentation
allRestrict access to GitLab instance to trusted networks only.
Configure firewall rules to limit inbound connections to GitLab ports
🧯 If You Can't Patch
- Implement strict rate limiting and monitor resource usage closely
- Isolate GitLab instance behind WAF with DoS protection enabled
🔍 How to Verify
Check if Vulnerable:
Check GitLab version via admin interface or command line. If version is between 1.0-16.11.4, 17.0-17.0.2, or 17.1-17.1.0, the system is vulnerable.Check Version:
sudo gitlab-rake gitlab:env:info | grep 'Version:'Verify Fix Applied:
Confirm GitLab version is 16.11.5, 17.0.3, or 17.1.1 or higher. Monitor for abnormal resource usage patterns.📡 Detection & Monitoring
Log Indicators:
- Unusually high CPU/memory usage in system logs
- Multiple failed requests or timeouts in GitLab logs
- Increased error rates in banzai pipeline processing
Network Indicators:
- High volume of requests to GitLab endpoints
- Unusual traffic patterns from single IP addresses
SIEM Query:
source="gitlab.log" AND ("resource exhaustion" OR "high memory" OR "banzai pipeline error")