CVE-2015-0634 in WebEx Meetings Server
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the administrative interface in Cisco WebEx Meetings Server 2.5 and 2.5.0.997 allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka Bug ID CSCuq86310.
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Analysis
by VulDB Data Team • 05/17/2022
The vulnerability identified as CVE-2015-0634 represents a critical cross-site scripting flaw within the administrative interface of Cisco WebEx Meetings Server version 2.5 and 2.5.0.997. This security weakness enables remote attackers to execute malicious web scripts or HTML code through the manipulation of crafted URLs, potentially compromising the integrity and confidentiality of the affected system. The vulnerability specifically targets the administrative components of the WebEx Meetings Server, which serves as a cornerstone for enterprise video conferencing and collaboration services, making it particularly concerning for organizations relying on this platform for their communication infrastructure.
The technical implementation of this XSS vulnerability stems from insufficient input validation and output encoding within the administrative interface of the WebEx Meetings Server. When administrators or authorized users navigate to specifically crafted URLs containing malicious payloads, the server fails to properly sanitize or escape the input parameters before rendering them in the web interface. This allows attackers to inject JavaScript code or HTML elements that execute within the context of the victim's browser session. The flaw operates at the application layer and leverages the trust relationship between the web application and its users, enabling attackers to bypass normal security controls and potentially escalate privileges or extract sensitive information from the administrative interface.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with a potential foothold for more sophisticated attacks within the enterprise network. An attacker who successfully exploits this vulnerability could potentially access administrative functions, modify system configurations, or even gain unauthorized access to user data and session information. The administrative interface typically contains sensitive configuration settings, user management capabilities, and system monitoring tools that could be leveraged to compromise the entire WebEx deployment. This vulnerability particularly affects organizations that depend heavily on WebEx for business-critical communications and collaboration, as it could lead to complete system compromise and data breaches.
Organizations should implement immediate mitigation strategies including applying the latest security patches released by Cisco, which address the input validation issues in the administrative interface. Network segmentation and access controls should be enhanced to limit exposure of the administrative interface to trusted networks only, while implementing proper web application firewalls to detect and block malicious URL patterns. Regular security assessments and input validation testing should be conducted to identify similar vulnerabilities within the WebEx deployment and other enterprise applications. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a clear violation of the principle of least privilege and secure input handling as outlined in various cybersecurity frameworks including the NIST Cybersecurity Framework and ISO 27001 standards. This vulnerability also maps to ATT&CK technique T1059.007 for script injection and T1078 for valid accounts usage, highlighting the multi-stage attack potential that such flaws present in enterprise environments.