Red Hat's 2024 GitLab Breach: Supply Chain Risks and the Rise of Crimson Collective
Executive Summary
In September 2024, Red Hat disclosed a breach of its self-managed GitLab instance used by its Consulting services, following claims by the Crimson Collective ransomware group of compromising over 28,000 private repositories. The attackers allegedly exfiltrated software source code and Customer Engagement Reports (CERs), which may contain network details, configuration data, and sensitive credentials. Red Hat initiated remediation steps and assured that its primary software supply chain and core products were not impacted. Belgian authorities warned of potential high-risk exposure for organizations with ties to Red Hat Consulting.
This incident underscores a growing trend of supply chain attacks targeting private code repositories and related assets, especially in environments where critical infrastructure and third-party integrations are involved. As ransomware groups pivot to extortion and supply chain vectors, organizations must urgently review their repository and credential management, even on self-managed systems.
Why This Matters Now
Supply chain attacks like this highlight urgent risks to customer and partner organizations, as stolen credentials and configuration data can facilitate downstream exploits. The growing sophistication and ransom-extortion focus of threat actors like Crimson Collective demand immediate review of third-party dependencies, rapid credential rotation, and stronger controls for private code repositories.
Attack Path Analysis
The attacker gained initial access to Red Hat’s self-managed GitLab instance, likely through exploitation of a vulnerability or compromised credentials. Escalating privileges, the adversary obtained broader access to repositories and sensitive CER files. Lateral movement within the cloud environment or GitLab project scopes allowed enumeration and access to thousands of private repositories containing client data and secrets. The attacker established command and control channels to maintain persistence and prepare data for exfiltration. Large-scale exfiltration of code and confidential CER files followed, risking exposure of network and authentication data. The operation culminated in an extortion threat to leak the stolen data, impacting Red Hat and downstream supply chain stakeholders.
Kill Chain Progression
Initial Compromise
Description
Attacker accessed Red Hat's self-managed GitLab instance—potentially exploiting a known vulnerability or valid credentials obtained through social engineering or credential theft.
Related CVEs
CVE-2023-7028
CVSS 9.8An issue in GitLab CE/EE allows password reset emails to be sent to unverified email addresses, potentially enabling unauthorized account access.
Affected Products:
GitLab GitLab CE/EE – 16.1 prior to 16.1.6, 16.2 prior to 16.2.9, 16.3 prior to 16.3.7, 16.4 prior to 16.4.5, 16.5 prior to 16.5.6, 16.6 prior to 16.6.4, 16.7 prior to 16.7.2
Exploit Status:
exploited in the wildCVE-2024-5655
CVSS 8.8An issue in GitLab CE/EE allows an attacker to trigger a pipeline as another user under certain circumstances.
Affected Products:
GitLab GitLab CE/EE – 15.8 prior to 16.11.5, 17.0 prior to 17.0.3, 17.1 prior to 17.1.1
Exploit Status:
no public exploitCVE-2024-6385
CVSS 9.8An issue in GitLab CE/EE allows an attacker to trigger a pipeline as another user under certain circumstances.
Affected Products:
GitLab GitLab CE/EE – 15.8 prior to 16.11.6, 17.0 prior to 17.0.4, 17.1 prior to 17.1.2
Exploit Status:
no public exploit
MITRE ATT&CK® Techniques
Supply Chain Compromise
Valid Accounts
Unsecured Credentials: Credentials in Files
Data from Cloud Storage Object
Exfiltration Over C2 Channel
Phishing: Spearphishing Attachment
Data Encrypted for Impact
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
PCI DSS 4.0 – Strong Authentication and Access Control
Control ID: 8.3.1
NYDFS 23 NYCRR 500 – Encryption of Nonpublic Information
Control ID: 500.15
DORA (Digital Operational Resilience Act) – ICT Risk Management
Control ID: Article 8
NIS2 Directive – Cybersecurity Risk-Management and Reporting Obligations
Control ID: Article 21
CISA Zero Trust Maturity Model 2.0 – Account Protection and Access Controls
Control ID: Identity Pillar
ISO/IEC 27001:2022 – Management of Secret Authentication Information
Control ID: A.9.2.4
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Computer Software/Engineering
Critical supply chain risk from compromised GitLab repositories containing source code, requiring zero trust segmentation and enhanced threat detection capabilities.
Information Technology/IT
High exposure through consulting services compromise exposing client infrastructure audits, authentication tokens, and configuration data requiring immediate credential rotation.
Financial Services
Severe compliance risk from potential exposure of authentication tokens and network configurations, violating PCI DSS requirements for secure development practices.
Health Care / Life Sciences
Critical HIPAA compliance breach risk from compromised customer engagement reports potentially containing protected health information and system access credentials.
Sources
- Red Hat Investigates Widespread Breach of Private GitLab Repositorieshttps://www.darkreading.com/application-security/red-hat-widespread-breaches-private-gitlab-repositoriesVerified
- FAQ: Data breach of Red Hat's self-managed GitLab instancehttps://support.gitlab.com/hc/en-us/articles/23301188655900-FAQ-Data-breach-of-Red-Hat-s-self-managed-GitLab-instanceVerified
- Red Hat GitLab Data Breach: The Crimson Collective's Attackhttps://blog.gitguardian.com/red-hat-gitlab-breach-the-crimson-collectives-attack/Verified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Zero Trust segmentation, east-west workload controls, egress policy enforcement, and distributed threat detection could have significantly narrowed the attack surface, detected lateral movement, and blocked mass exfiltration of sensitive data and secrets, thus preventing large-scale supply chain impact.
Control: Cloud Native Security Fabric (CNSF)
Mitigation: Inline security posture checks and cloud-native controls prevent direct exposure of vulnerable interfaces.
Control: Zero Trust Segmentation
Mitigation: Least privilege policies restrict user rights and isolate critical assets.
Control: East-West Traffic Security
Mitigation: Internal segmentation and traffic inspection block unauthorized lateral movement.
Control: Threat Detection & Anomaly Response
Mitigation: Anomaly detection and real-time alerts identify suspicious remote access and command patterns.
Control: Egress Security & Policy Enforcement
Mitigation: Outbound traffic filtering and FQDN controls stop mass data exfiltration.
Comprehensive incident visibility enables rapid response and limits supply chain blowback.
Impact at a Glance
Affected Business Functions
- Consulting Services
- Customer Relationship Management
- Software Development
Estimated downtime: 7 days
Estimated loss: $5,000,000
The breach exposed sensitive Customer Engagement Reports (CERs) containing infrastructure details, authentication credentials, and network configurations of approximately 800 organizations, including major enterprises and government entities.
Recommended Actions
Key Takeaways & Next Steps
- • Enforce zero trust segmentation and identity-based policies to limit lateral movement and privilege abuse in cloud-native environments.
- • Implement east-west traffic controls and threat detection to detect and block intra-cloud reconnaissance or pivoting tactics.
- • Deploy strong egress filtering and real-time policy enforcement to prevent unauthorized data exfiltration from code repositories.
- • Ensure cloud-native inline controls (CNSF) for posture assessment and automated policy enforcement at all ingress and egress points.
- • Maintain centralized visibility and incident response capabilities to monitor and rapidly contain supply chain and internal SaaS compromise.
