CVE-2019-6167 in Service Bridge
Summary
by MITRE
A vulnerability reported in Lenovo Service Bridge before version 4.1.0.1 could allow remote code execution.
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Analysis
by VulDB Data Team • 10/08/2023
The vulnerability identified as CVE-2019-6167 resides within Lenovo Service Bridge, a software component designed to facilitate remote management and support services for lenovo devices. This particular flaw represents a critical security weakness that exists in versions prior to 4.1.0.1, creating a potential gateway for malicious actors to execute arbitrary code on affected systems. The vulnerability stems from improper input validation mechanisms within the service bridge application, which fails to adequately sanitize user-supplied data before processing. This insufficient sanitization creates a pathway for attackers to inject malicious code that can be executed with the privileges of the service bridge process, potentially leading to complete system compromise.
The technical exploitation of this vulnerability occurs through the manipulation of input parameters that the service bridge component accepts from remote sources. Attackers can craft specially formatted requests that bypass normal validation checks, allowing them to inject and execute malicious payloads directly on the target system. This remote code execution capability is particularly dangerous because it does not require authentication or local access, making it accessible to attackers over network connections. The flaw operates at the application layer, where the service bridge processes incoming commands and data without sufficient verification mechanisms to prevent code injection attacks. This vulnerability aligns with CWE-74, which describes weaknesses related to improper neutralization of special elements used in data queries, and represents a classic example of a command injection vulnerability that has been exploited in numerous enterprise environments.
The operational impact of CVE-2019-6167 extends far beyond simple data compromise, as successful exploitation can lead to complete system takeover and persistent access within network environments. Organizations utilizing vulnerable versions of Lenovo Service Bridge face significant risks including unauthorized access to sensitive corporate data, potential lateral movement within networks, and the establishment of backdoor access points for extended periods. The vulnerability's remote nature means that attackers can target systems from outside the corporate network, making traditional perimeter defenses insufficient for protection. Security professionals have documented similar attack patterns where service bridge components have been used as initial access points for more sophisticated attacks, including data exfiltration operations and the deployment of additional malware payloads. This vulnerability particularly affects enterprise environments where multiple lenovo devices are managed through centralized service bridge implementations.
Mitigation strategies for CVE-2019-6167 primarily focus on immediate remediation through software updates to version 4.1.0.1 or later, which contain the necessary patches to address the input validation deficiencies. Organizations should conduct comprehensive inventory assessments to identify all systems running vulnerable versions of Lenovo Service Bridge and prioritize their remediation. Network segmentation measures can provide additional protection by limiting access to service bridge components to trusted administrative networks only. Security monitoring should be enhanced to detect unusual patterns of communication with service bridge endpoints, as these may indicate exploitation attempts. The implementation of web application firewalls and intrusion detection systems can provide additional layers of defense against exploitation attempts. Organizations should also consider disabling the service bridge functionality entirely if it is not required for business operations, following the principle of least privilege. This vulnerability demonstrates the importance of maintaining up-to-date software versions and the potential consequences of legacy system components that may not receive adequate security updates. The ATT&CK framework categorizes this vulnerability under initial access and execution tactics, highlighting how such flaws can serve as entry points for broader attack campaigns within enterprise environments.