CVE-2022-28147 in Continuous Integration with Toad Edge Plugin
Summary
by MITRE • 03/29/2022
A missing permission check in Jenkins Continuous Integration with Toad Edge Plugin 2.3 and earlier allows attackers with Overall/Read permission to check for the existence of an attacker-specified file path on the Jenkins controller file system.
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Analysis
by VulDB Data Team • 04/01/2022
The vulnerability identified as CVE-2022-28147 represents a critical permission bypass flaw within Jenkins Continuous Integration platform when utilizing the Toad Edge Plugin version 2.3 or earlier. This issue stems from inadequate access control mechanisms that fail to properly validate user permissions before executing file system operations. The vulnerability specifically affects systems where the Toad Edge Plugin is installed and configured, creating a pathway for unauthorized file system enumeration by users who possess only the basic Overall/Read permission level.
The technical implementation of this flaw resides in the plugin's failure to perform proper authorization checks when processing file existence requests. Attackers with minimal privileges can exploit this weakness to probe the Jenkins controller's file system and determine whether specific files or directories exist within the system's filesystem hierarchy. This missing permission check creates a reconnaissance opportunity that can reveal sensitive system information, including the presence of configuration files, backup data, or other potentially sensitive resources that should remain hidden from unauthorized users. The vulnerability operates at the application layer and specifically targets the file system access controls implemented within the Jenkins platform.
The operational impact of this vulnerability extends beyond simple information disclosure, as it enables attackers to map the underlying file system structure of the Jenkins controller. This reconnaissance capability can serve as a foundation for more sophisticated attacks, potentially revealing paths to privilege escalation or further exploitation. An attacker can systematically probe various file paths to identify sensitive files such as credential stores, configuration files containing secrets, or system binaries that might be leveraged for additional compromise. The vulnerability affects the fundamental security model of the Jenkins platform by allowing unauthorized enumeration of system resources that should remain protected.
Organizations utilizing Jenkins with the Toad Edge Plugin must implement immediate remediation measures to address this vulnerability. The primary mitigation involves upgrading to a patched version of the Toad Edge Plugin that properly implements access control checks for file system operations. System administrators should also review and tighten overall permission models within Jenkins to minimize the potential impact of such flaws. Additionally, implementing network segmentation and monitoring for unusual file system access patterns can help detect exploitation attempts. This vulnerability aligns with CWE-284, which describes improper access control issues, and represents a clear violation of the principle of least privilege that should be enforced within CI/CD environments. The ATT&CK framework categorizes this as a reconnaissance technique, specifically file system enumeration, which is often used as a precursor to more advanced attack vectors in the attack lifecycle.