CVE-2016-8221 in XClarity Administrator
Summary
by MITRE
Privilege Escalation in Lenovo XClarity Administrator earlier than 1.2.0, if LXCA is used to manage rack switches or chassis with embedded input/output modules (IOMs), certain log files viewable by authenticated users may contain passwords for internal administrative LXCA accounts with temporary passwords that are used internally by LXCA code.
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Analysis
by VulDB Data Team • 01/13/2017
The vulnerability described in CVE-2016-8221 represents a significant privilege escalation flaw within Lenovo XClarity Administrator version 1.2.0 and earlier. This issue specifically affects environments where LXCA manages rack switches or chassis equipped with embedded input/output modules, creating a potential security risk for organizations relying on Lenovo's infrastructure management solutions. The vulnerability stems from improper handling of sensitive information within log files, which exposes administrative credentials that should remain protected. The flaw enables authenticated users to access log files containing temporary passwords for internal LXCA administrative accounts, fundamentally compromising the security model of the management platform.
The technical implementation of this vulnerability involves the logging of administrative credentials within accessible log files that are viewable by authenticated users. This represents a classic case of insecure logging practices where sensitive authentication data is not properly sanitized or protected from unauthorized access. The temporary passwords for internal administrative accounts are stored in clear text within these log files, creating an opportunity for privilege escalation attacks. Attackers who gain authenticated access to the LXCA environment can exploit this weakness by examining log files to discover these temporary administrative credentials, which then provide them with elevated privileges within the system. This vulnerability directly maps to CWE-532, which addresses information exposure through log files, and CWE-259, which covers weak password management practices.
The operational impact of CVE-2016-8221 extends beyond simple credential exposure, as it enables attackers to escalate privileges within the management environment. Organizations using affected versions of Lenovo XClarity Administrator face potential compromise of their entire infrastructure management ecosystem, as these temporary administrative credentials could provide access to critical network components and management functions. The vulnerability creates a persistent threat vector that could allow attackers to maintain access and potentially escalate their privileges to full administrative control. This risk is particularly concerning in enterprise environments where LXCA serves as a central management point for multiple network devices, as compromise of a single authenticated user account could lead to widespread system compromise.
Organizations should implement immediate mitigation strategies to address this vulnerability, including upgrading to Lenovo XClarity Administrator version 1.2.0 or later where the issue has been resolved. System administrators should also implement additional controls such as restricting access to log files, implementing proper log file permissions, and monitoring for unauthorized access attempts to sensitive administrative resources. The mitigation approach should align with ATT&CK technique T1078 which addresses valid accounts and privilege escalation through legitimate administrative access points. Regular security assessments and log file monitoring should be implemented to detect potential exploitation attempts and ensure that sensitive information is properly protected from unauthorized access. Additionally, organizations should consider implementing network segmentation and access controls to limit the potential impact of credential exposure within their infrastructure management environments.