CVE-2022-23116 in Conjur Secrets Plugin
Summary
by MITRE • 01/12/2022
Jenkins Conjur Secrets Plugin 1.0.9 and earlier implements functionality that allows attackers able to control agent processes to decrypt secrets stored in Jenkins obtained through another method.
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Analysis
by VulDB Data Team • 01/16/2022
The vulnerability identified as CVE-2022-23116 affects the Conjur Secrets Plugin for Jenkins version 1.0.9 and earlier, presenting a significant security risk that exploits a flaw in how secrets are handled within the Jenkins environment. This issue stems from the plugin's implementation that permits attackers who can control agent processes to decrypt secrets that have already been obtained through alternative means, creating a dangerous escalation path for malicious actors.
The technical flaw resides in the plugin's improper handling of secret decryption mechanisms when agent processes are compromised. When an attacker gains control over a Jenkins agent process, they can leverage this access to perform decryption operations on secrets that were previously obtained through other attack vectors. This represents a critical failure in the principle of least privilege and proper access control implementation, as the plugin does not adequately verify the integrity and authorization of processes attempting to access decrypted secrets.
The operational impact of this vulnerability is severe as it allows attackers to escalate privileges and access sensitive information that was previously thought to be protected. Jenkins agents are often deployed across multiple environments and may have elevated privileges, making them attractive targets for attackers seeking to expand their access. Once an attacker controls an agent, they can decrypt secrets stored in Jenkins, potentially gaining access to database credentials, API keys, cryptographic tokens, and other sensitive data that should remain protected.
This vulnerability aligns with CWE-284, which addresses improper access control, and demonstrates how inadequate privilege separation can lead to information disclosure. The attack pattern follows the MITRE ATT&CK framework's technique T1552, focusing on credentials theft through access to protected files and the exploitation of compromised systems to gain further access to sensitive information. The vulnerability essentially creates a backdoor through which attackers can bypass normal security controls that protect secrets within the Jenkins environment.
Organizations should immediately upgrade to a patched version of the Conjur Secrets Plugin to remediate this vulnerability. Additionally, implementing network segmentation and monitoring for unusual agent process behavior can help detect potential exploitation attempts. Regular security audits of Jenkins configurations and agent deployments should be conducted to ensure proper access controls and privilege management. The principle of defense in depth should be applied by implementing multiple layers of security controls beyond just the plugin itself, including secure network configurations, regular credential rotation, and comprehensive monitoring of secret access patterns to detect anomalous behavior that might indicate exploitation attempts.