CVE-2024-29037
CVE-2024-29037
Weakness (CWE)
CVSS Vector
v3.1- Attack Vector
- Network
- Attack Complexity
- Low
- Privileges Required
- None
- User Interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Description
datahub-helm provides the Kubernetes Helm charts for deploying Datahub and its dependencies on a Kubernetes cluster. Starting in version 0.1.143 and prior to version 0.2.182, due to configuration issues in the helm chart, if there was a successful initial deployment during a limited window of time, personal access tokens were possibly created with a default secret key. Since the secret key is a static, publicly available value, someone could inspect the algorithm used to generate personal access tokens and generate their own for an instance. Deploying with Metadata Service Authentication enabled would have been difficult during window of releases. If someone circumvented the helm settings and manually set Metadata Service Authentication to be enabled using environment variables directly, this would skip over the autogeneration logic for the Kubernetes Secrets and DataHub GMS would default to the signing key specified statically in the application.yml. Most deployments probably did not attempt to circumvent the helm settings to enable Metadata Service Authentication during this time, so impact is most likely limited. Any deployments with Metadata Service Authentication enabled should ensure that their secret values are properly randomized. Version 0.2.182 contains a patch for this issue. As a workaround, one may reset the token signing key to be a random value, which will invalidate active personal access tokens.
Comprehensive Technical Analysis of CVE-2024-29037
1. Vulnerability Assessment and Severity Evaluation
CVE ID: CVE-2024-29037 CVSS Score: 9.1 Severity: Critical
The vulnerability in datahub-helm arises from a configuration issue in the Helm charts used for deploying Datahub on Kubernetes clusters. Specifically, versions between 0.1.143 and 0.2.182 may generate personal access tokens using a default, static secret key. This static key is publicly available, making it possible for an attacker to generate valid tokens and gain unauthorized access.
The CVSS score of 9.1 indicates a critical vulnerability due to the potential for unauthorized access and the ease of exploitation if the static key is known.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Token Generation: An attacker could inspect the algorithm used to generate personal access tokens and, knowing the static secret key, generate valid tokens.
- Metadata Service Authentication Bypass: If Metadata Service Authentication is manually enabled using environment variables, the default signing key in
application.ymlcould be used, bypassing the intended security measures.
Exploitation Methods:
- Unauthorized Access: By generating valid tokens, an attacker could gain unauthorized access to Datahub instances.
- Data Exfiltration: With access to Datahub, an attacker could exfiltrate sensitive data or manipulate metadata.
- Service Disruption: An attacker could disrupt services by invalidating active personal access tokens, causing legitimate users to lose access.
3. Affected Systems and Software Versions
Affected Versions:
datahub-helmversions 0.1.143 to 0.2.182
Affected Systems:
- Kubernetes clusters deploying Datahub using the affected versions of
datahub-helm. - Systems where Metadata Service Authentication was manually enabled using environment variables.
4. Recommended Mitigation Strategies
- Upgrade to Patched Version: Upgrade to
datahub-helmversion 0.2.182 or later, which contains the patch for this issue. - Randomize Secret Values: Ensure that secret values used for token generation are properly randomized.
- Review and Reset Tokens: Reset the token signing key to a random value, which will invalidate active personal access tokens. Notify users to regenerate their tokens.
- Monitor for Unauthorized Access: Implement monitoring and alerting for unauthorized access attempts.
- Regular Security Audits: Conduct regular security audits of Helm charts and Kubernetes configurations to identify and mitigate similar issues.
5. Impact on Cybersecurity Landscape
This vulnerability highlights the importance of secure configuration management in Kubernetes deployments. The use of static, publicly available keys for token generation underscores the need for robust secret management practices. Organizations must ensure that secrets are properly randomized and managed to prevent unauthorized access.
The critical nature of this vulnerability emphasizes the need for continuous monitoring and timely patching of Kubernetes deployments. It also underscores the importance of following best practices for Helm chart configurations and Kubernetes security.
6. Technical Details for Security Professionals
Vulnerability Details:
- Root Cause: Configuration issues in the Helm chart leading to the use of a static, publicly available secret key for token generation.
- Affected Components: Personal access token generation mechanism and Metadata Service Authentication settings.
- Patch Information: Version 0.2.182 includes a fix that ensures proper randomization of secret values used for token generation.
Mitigation Steps:
- Upgrade Helm Chart:
helm upgrade datahub acryldata/datahub-helm --version 0.2.182 - Randomize Secret Values:
# application.yml token: signingKey: <random-value> - Reset Token Signing Key:
kubectl set env deployment/datahub TOKEN_SIGNING_KEY=$(openssl rand -hex 32) - Monitoring and Alerting:
- Implement Kubernetes audit logs to monitor for unauthorized access attempts.
- Use tools like Falco or Kube-bench for continuous security monitoring.
References:
By following these recommendations and staying vigilant, organizations can mitigate the risks associated with CVE-2024-29037 and enhance the overall security of their Kubernetes deployments.