CVE-2022-28146 in Continuous Integration with Toad Edge Plugin
Summary
by MITRE • 03/29/2022
Jenkins Continuous Integration with Toad Edge Plugin 2.3 and earlier allows attackers with Item/Configure permission to read arbitrary files on the Jenkins controller by specifying an input folder on the Jenkins controller as a parameter to its build steps.
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Analysis
by VulDB Data Team • 04/01/2022
The vulnerability identified as CVE-2022-28146 affects Jenkins Continuous Integration systems that utilize the Toad Edge Plugin version 2.3 or earlier. This security flaw represents a critical path traversal issue that enables authenticated attackers with specific permissions to access sensitive files on the Jenkins controller. The vulnerability exists within the plugin's handling of input folder parameters during build steps, creating an opportunity for unauthorized file access that could expose confidential system information.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the Toad Edge Plugin's parameter processing mechanisms. When attackers specify an input folder path as a parameter to build steps, the plugin fails to properly validate or sanitize the input, allowing malicious path traversal sequences to be executed. This weakness enables attackers to navigate beyond the intended directory boundaries and access arbitrary files on the Jenkins controller filesystem. The vulnerability is particularly dangerous because it requires only the relatively common Item/Configure permission, which many users possess in typical Jenkins environments.
The operational impact of this vulnerability extends beyond simple file access, as it can potentially expose sensitive configuration files, credential stores, build artifacts, and other confidential data stored on the Jenkins controller. Attackers could leverage this vulnerability to extract passwords, API keys, source code repositories, and other valuable information that could be used for further exploitation. The risk is amplified in environments where Jenkins controllers host multiple projects with varying security requirements, as a single compromised build step could potentially expose information across multiple projects.
Organizations should immediately upgrade to Toad Edge Plugin version 2.4 or later, which includes proper input validation and sanitization mechanisms to prevent path traversal attacks. System administrators should also implement additional security controls such as restricting the Item/Configure permission to only trusted users, conducting regular security audits of Jenkins configurations, and monitoring for suspicious file access patterns. The vulnerability aligns with CWE-22 Path Traversal and can be categorized under ATT&CK technique T1078 Valid Accounts, as it leverages existing user permissions to escalate privileges. Additionally, this issue demonstrates the importance of input validation in plugin architectures and highlights the need for comprehensive security testing of third-party integrations within CI/CD pipelines.