CVE-2023-37950 in mabl Plugin
Summary
by MITRE • 07/12/2023
A missing permission check in Jenkins mabl Plugin 0.0.46 and earlier allows attackers with Overall/Read permission to enumerate credentials IDs of credentials stored in Jenkins.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 08/02/2023
The vulnerability identified as CVE-2023-37950 represents a critical permission escalation issue within the Jenkins mabl plugin version 0.0.46 and earlier. This flaw stems from an inadequate validation mechanism that fails to properly enforce access controls when processing credential enumeration requests. The mabl plugin, designed for automated testing and continuous integration workflows, contains a logical error in its permission validation logic that allows unauthorized users to discover credential identifiers stored within the Jenkins system. This vulnerability specifically affects environments where the mabl plugin is installed and configured with default or standard security settings.
The technical implementation of this vulnerability occurs through a missing permission check that should validate whether the requesting user possesses sufficient privileges before exposing credential information. When an attacker with only Overall/Read permission attempts to access credential enumeration endpoints, the plugin fails to verify that the user should have access to such sensitive information. This oversight creates a pathway for attackers to systematically discover valid credential IDs within the Jenkins credential store, effectively bypassing the intended access control boundaries. The flaw operates at the application logic level and demonstrates a failure in proper authorization enforcement mechanisms.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with critical reconnaissance data that can be leveraged for further exploitation. Once credential IDs are enumerated, attackers can potentially target these specific credentials with credential brute force attacks, password spraying, or other exploitation techniques. The vulnerability enables a form of lateral movement within the Jenkins environment, as attackers can use the discovered credential identifiers to craft more targeted attacks against specific credential stores. This issue particularly affects organizations that rely on Jenkins for CI/CD pipelines where multiple credential sets are managed within the same system.
Organizations should implement immediate mitigations including upgrading to the patched version of the mabl plugin where available, or applying the recommended security patches provided by Jenkins maintainers. Administrators should also consider implementing additional access controls and monitoring mechanisms to detect unauthorized credential enumeration attempts. The vulnerability aligns with CWE-284, which addresses improper access control issues, and represents a specific instance of insufficient authorization checks. From an ATT&CK perspective, this vulnerability maps to T1552.001 for credentials from password stores and T1078 for valid accounts, as it enables attackers to discover and potentially exploit legitimate credential identifiers within the system. Security teams should also review their Jenkins configurations to ensure that credential access is properly restricted and that unnecessary permissions are not granted to users with read-only access levels.