CVE-2025-47884

Comprehensive Technical Analysis of CVE-2025-47884

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-47884 CVSS Score: 9.1

The vulnerability in the Jenkins OpenID Connect Provider Plugin, specifically in versions 96.vee8ed882ec4d and earlier, involves the improper handling of environment variables during the generation of build ID Tokens. This flaw allows attackers to manipulate these tokens, potentially leading to unauthorized access to external services by impersonating trusted jobs.

Severity Evaluation:

• CVSS Score: 9.1 (Critical)
• Impact: High
• Exploitability: High

The high CVSS score indicates a critical vulnerability that can be easily exploited with severe consequences. The potential for unauthorized access to external services makes this vulnerability particularly dangerous in environments where Jenkins is integrated with other critical systems.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Environment Variable Manipulation: Attackers can exploit the vulnerability by configuring jobs in Jenkins to override environment variables used in the generation of build ID Tokens.
2. Job Configuration: Attackers with the ability to configure jobs can craft malicious build ID Tokens that impersonate trusted jobs.
3. Plugin Interaction: The vulnerability can be exacerbated by the interaction with other plugins that allow for more extensive job configuration capabilities.

Exploitation Methods:

1. Token Crafting: By manipulating environment variables, attackers can craft build ID Tokens that appear legitimate but are actually malicious.
2. Impersonation: These crafted tokens can be used to impersonate trusted jobs, gaining unauthorized access to external services.
3. Lateral Movement: Once access is gained, attackers can move laterally within the network, potentially compromising other systems and services.

3. Affected Systems and Software Versions

Affected Software:

• Jenkins OpenID Connect Provider Plugin versions 96.vee8ed882ec4d and earlier.

Affected Systems:

• Any Jenkins installation using the affected versions of the OpenID Connect Provider Plugin.
• Systems integrated with Jenkins that rely on build ID Tokens for authentication and authorization.

4. Recommended Mitigation Strategies

Immediate Actions:

1. Update Plugin: Upgrade to the latest version of the Jenkins OpenID Connect Provider Plugin that addresses this vulnerability.
2. Restrict Job Configuration: Limit the ability to configure jobs to trusted users only.
3. Monitor Environment Variables: Implement monitoring and alerting for unusual changes in environment variables used in token generation.

Long-Term Strategies:

1. Regular Audits: Conduct regular security audits of Jenkins configurations and plugins.
2. Least Privilege: Enforce the principle of least privilege for job configuration and access to external services.
3. Network Segmentation: Implement network segmentation to limit the potential impact of lateral movement.

5. Impact on Cybersecurity Landscape

The discovery of CVE-2025-47884 highlights the importance of secure configuration management and the risks associated with environment variable manipulation. This vulnerability underscores the need for robust security practices in DevOps environments, where continuous integration and continuous deployment (CI/CD) tools like Jenkins are widely used. The potential for unauthorized access to external services can have far-reaching implications, including data breaches, service disruptions, and financial losses.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: Improper handling of environment variables during the generation of build ID Tokens.
• Trigger: The vulnerability is triggered when an attacker configures a job to override these environment variables.
• Exploit: The crafted build ID Token can impersonate a trusted job, leading to unauthorized access.

Detection and Response:

1. Log Analysis: Review Jenkins logs for unusual job configurations and environment variable changes.
2. Intrusion Detection: Implement intrusion detection systems (IDS) to monitor for suspicious activities related to job configuration and token generation.
3. Incident Response: Develop an incident response plan that includes steps for identifying, containing, and remediating compromised Jenkins instances.

Prevention:

1. Secure Configuration: Ensure that Jenkins and its plugins are configured securely, following best practices.
2. Regular Updates: Keep Jenkins and all associated plugins up to date with the latest security patches.
3. Access Control: Implement strict access controls for job configuration and external service integration.

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risks associated with CVE-2025-47884 and enhance the overall security of their DevOps environments.