CVE-2022-29049 in Promoted Builds Plugin
Summary
by MITRE • 04/13/2022
Jenkins promoted builds Plugin 873.v6149db_d64130 and earlier, except 3.10.1, does not validate the names of promotions defined in Job DSL, allowing attackers with Job/Configure permission to create a promotion with an unsafe name.
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Analysis
by VulDB Data Team • 04/19/2022
The vulnerability identified as CVE-2022-29049 affects the Jenkins promoted builds plugin version 873.v6149db_d64130 and earlier, excluding version 3.10.1. This security flaw resides within the plugin's handling of Job DSL configurations, specifically targeting the validation mechanisms for promotion names. The issue manifests when administrators or authorized users leverage Job/Configure permissions to define promotions through Job DSL scripts, creating a potential attack vector for privilege escalation and system compromise.
The technical root cause of this vulnerability stems from inadequate input validation within the plugin's processing pipeline for promotion names. When Jenkins processes Job DSL scripts containing promotion definitions, the system fails to properly sanitize or validate the naming conventions used for these promotions. This validation gap allows attackers to inject malicious naming patterns that could bypass normal security controls. The vulnerability specifically impacts the plugin's ability to distinguish between legitimate and potentially harmful promotion identifiers, creating a pathway for attackers to manipulate the build promotion system.
From an operational perspective, this vulnerability enables attackers with minimal permissions to exploit the system's trust model and gain unauthorized control over build promotion workflows. The impact extends beyond simple privilege escalation as it allows for potential code injection, arbitrary file operations, and system command execution through carefully crafted promotion names. Attackers can leverage this weakness to manipulate build artifacts, redirect promotion workflows, or even establish persistent access points within the Jenkins environment. The vulnerability's severity increases when considering that Job/Configure permissions are often granted to developers or CI/CD team members who may not require such elevated privileges.
The security implications align with CWE-20, which addresses "Improper Input Validation" in software systems. This weakness creates a direct pathway for attackers to bypass intended security controls and manipulate system behavior through malformed inputs. The vulnerability also maps to ATT&CK technique T1059.001, which covers "Command and Scripting Interpreter: PowerShell," as attackers can potentially leverage the unsafe promotion names to execute arbitrary commands within the Jenkins environment. Organizations using Jenkins with the affected plugin version face significant risk of unauthorized access and potential system compromise.
Mitigation strategies for CVE-2022-29049 should prioritize immediate plugin version updates to 3.10.1 or later, which contains the necessary validation fixes. Organizations must also implement additional security controls including restricting Job/Configure permissions to only trusted administrators, implementing robust input sanitization for all Job DSL scripts, and establishing monitoring for unusual promotion naming patterns. Network segmentation and privilege least-privilege principles should be enforced to minimize the potential impact of successful exploitation. Regular security assessments and vulnerability scanning should be conducted to identify similar validation gaps in other Jenkins plugins and ensure comprehensive protection against similar attack vectors.