CVE-2018-0111 in WebEx Meetings Server
Summary
by MITRE
A vulnerability in Cisco WebEx Meetings Server could allow an unauthenticated, remote attacker to access sensitive data about the application. An attacker could exploit this vulnerability to gain information to conduct additional reconnaissance attacks. The vulnerability is due to a design flaw in Cisco WebEx Meetings Server, which could include internal network information that should be restricted. An attacker could exploit the vulnerability by utilizing available resources to study the customer network. An exploit could allow the attacker to discover sensitive data about the application. Cisco Bug IDs: CSCvg46806.
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Analysis
by VulDB Data Team • 02/01/2021
The vulnerability identified as CVE-2018-0111 represents a critical information disclosure flaw within Cisco WebEx Meetings Server that exposes internal network details to unauthenticated remote attackers. This design flaw fundamentally compromises the server's security posture by inadvertently revealing sensitive application metadata that should remain restricted to authorized personnel only. The vulnerability stems from insufficient access controls and improper data isolation mechanisms within the WebEx Meetings Server implementation, creating an attack surface that allows malicious actors to gather intelligence about the underlying infrastructure.
The technical exploitation of this vulnerability occurs through the manipulation of available server resources and network reconnaissance techniques that leverage the server's design shortcomings. Attackers can systematically analyze the application's responses to gather information about internal network topology, server configurations, and potentially sensitive operational details that would normally be protected within a secure environment. This reconnaissance capability enables attackers to map network structures and identify potential targets for subsequent attacks, making the vulnerability particularly dangerous as it serves as a foundation for more sophisticated exploitation attempts.
From an operational impact perspective, this vulnerability creates significant risks for organizations relying on Cisco WebEx Meetings Server for their communication infrastructure. The exposure of internal network information provides attackers with valuable intelligence that can be used to plan targeted attacks against other systems within the organization's network perimeter. The vulnerability essentially undermines the principle of least privilege by allowing unauthorized access to data that should remain confidential, potentially enabling attackers to identify network segments, server roles, and other sensitive operational details that could facilitate privilege escalation or lateral movement attacks.
The security implications extend beyond simple information disclosure, as this vulnerability aligns with multiple attack patterns documented in the MITRE ATT&CK framework, particularly those related to reconnaissance and credential access phases. Organizations may find themselves vulnerable to advanced persistent threats that leverage this initial reconnaissance data to conduct more targeted attacks. The vulnerability also demonstrates weaknesses in Cisco's secure coding practices and configuration management, highlighting the importance of proper input validation and access control implementation in enterprise communication platforms.
Mitigation strategies should focus on implementing network segmentation to limit access to WebEx Meetings Server components, deploying intrusion detection systems to monitor for anomalous access patterns, and applying the vendor-provided security patches that address the underlying design flaw. Organizations should also conduct comprehensive network audits to identify other potential information disclosure vulnerabilities and implement proper access controls to prevent unauthorized data exposure. The vulnerability underscores the critical importance of maintaining up-to-date security configurations and regularly reviewing application security controls to prevent similar issues from compromising organizational security postures. This flaw represents a design-level weakness that requires both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities in future implementations.