CVE-2017-18470 in cPanel
Summary
by MITRE
cPanel before 62.0.4 has a fixed password for the Munin MySQL test account (SEC-196).
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Analysis
by VulDB Data Team • 07/21/2020
The vulnerability identified as CVE-2017-18470 represents a critical security flaw in cPanel versions prior to 62.0.4 that exposes systems to unauthorized access through a hardcoded credential mechanism. This issue specifically affects the Munin MySQL test account, which is utilized for monitoring database performance and health within cPanel environments. The vulnerability stems from the implementation of a fixed password that remains unchanged across deployments, creating a persistent security risk that can be exploited by malicious actors. The weakness lies in the design decision to use a predetermined password rather than generating unique credentials for each installation, which fundamentally violates security best practices for credential management.
The technical nature of this vulnerability allows attackers to gain unauthorized access to MySQL monitoring services through the predictable authentication mechanism. When cPanel initializes the Munin monitoring system, it automatically configures a test account with a known, hardcoded password that is documented in various security resources. This creates an attack surface where any individual with knowledge of the specific password can access database monitoring interfaces, potentially leading to data exfiltration, service disruption, or further lateral movement within the network. The flaw demonstrates poor security engineering practices and represents a classic case of hardcoding credentials in software, which is classified under CWE-798 as the use of hard-coded credentials.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to gather sensitive information about database performance, resource utilization, and system configurations. This monitoring data can be leveraged for more sophisticated attacks including reconnaissance for additional vulnerabilities, privilege escalation opportunities, or to identify other systems within the network that may be similarly compromised. The exposure of monitoring data through this backdoor can provide attackers with valuable insights into system behavior and performance characteristics, which can be used to refine attack strategies and evade detection mechanisms. This vulnerability directly aligns with ATT&CK technique T1046 for network service scanning and T1083 for file and directory discovery, as attackers can use the monitoring interface to gather system information.
Organizations affected by this vulnerability should immediately implement mitigation strategies including updating to cPanel version 62.0.4 or later where the hardcoded password has been removed or replaced with dynamically generated credentials. The update process should include verification that the Munin monitoring configuration no longer relies on fixed credentials and that proper authentication mechanisms are in place. Network segmentation and access controls should be implemented to limit access to monitoring interfaces, while regular security audits should verify that no hardcoded credentials remain in the system. Additionally, organizations should consider implementing automated monitoring for unauthorized access attempts to database services and establish incident response procedures for potential exploitation of this vulnerability. The remediation process must ensure that any existing monitoring accounts are properly secured and that new authentication mechanisms are properly configured to prevent similar issues in future deployments.