Overview of CVE-2025-27622
CVE-2025-27622 represents a critical security vulnerability affecting Jenkins, a widely used automation server in DevOps and CI/CD pipelines. Discovered in versions Jenkins 2.499 and earlier, as well as LTS 2.492.1 and earlier, this vulnerability does not sufficiently protect encrypted values of secrets when accessing the config.xml of agents through REST API or CLI. This oversight allows threat actors with the appropriate permissions to access potentially sensitive encrypted data.
Details of the Vulnerability
The essence of CVE-2025-27622 lies in the inadequate redaction of encrypted secret values in the config.xml files accessed via REST API or CLI. Specifically, if an attacker has Agent/Extended Read permission, they can potentially view the encrypted secrets, thus posing a significant risk of data exposure that could be exploited in further attacks.
Versions 2.492.2 and 2.500 have been identified as unafflicted by this specific issue. However, with Jenkins being a critical component in many organizational infrastructures, addressing this vulnerability in affected versions is paramount.
Mitigation Strategies
To mitigate the risks associated with CVE-2025-27622, organizations should implement the following strategies:
- Upgrade Jenkins: The primary and most effective mitigation step is upgrading to Jenkins version 2.492.2 or later. Versions post-2.500 are considered unaffected as well. Upgrading ensures that the issue is inherently fixed, securing encrypted secrets in config.xml files.
- Limit Permissions: Restrict Agent/Extended Read permissions to users who absolutely require it. Implement stringent access controls to ensure that only trusted and authenticated users have access to sensitive operational data.
- Implement Network Segmentation: Utilize network segmentation to isolate Jenkins instances and limit potential access pathways for unauthorized users.
- Audit and Monitor Access Logs: Regularly audit and review access logs to detect any unauthorized or suspicious activities targeting the Jenkins infrastructure.
Conclusion
In the realm of cybersecurity, timely identification and mitigation of vulnerabilities like CVE-2025-27622 are critical to maintaining the integrity and confidentiality of sensitive information. By understanding the implications of this flaw and deploying the recommended mitigation strategies, organizations can protect their CI/CD environments against potential exploits. Always ensure regular updates and adhere to best security practices to safeguard against future vulnerabilities.
For further guidance, refer to the official Jenkins Security Advisory: Jenkins Security Advisory 2025-03-05.