CVE-2016-1447 in WebEx Meetings Server
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the administrator interface in Cisco WebEx Meetings Server 2.6 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, aka Bug ID CSCuy83194.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 09/05/2022
The vulnerability identified as CVE-2016-1447 represents a critical cross-site scripting flaw within the administrator interface of Cisco WebEx Meetings Server version 2.6. This security weakness exposes organizations to potential exploitation by malicious actors who can inject arbitrary web scripts or HTML content into the system. The vulnerability specifically affects the administrative components of the WebEx Meetings Server, which serves as the management interface for configuring and overseeing meeting services. The issue is particularly concerning because it targets the privileged administrative interface, potentially allowing attackers to gain elevated access or manipulate system configurations. The unspecified attack vectors suggest that multiple entry points within the administrative interface may be susceptible to this form of injection attack, making the vulnerability particularly dangerous as it could be exploited through various methods.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding within the administrator interface components of the WebEx Meetings Server. When administrators interact with the web-based management console, the system fails to properly sanitize user-supplied input before rendering it in the browser context. This allows malicious actors to craft specially crafted payloads that, when processed by the server and subsequently displayed to authenticated administrators, execute within the browser context of the administrative session. The vulnerability operates under CWE-79 which categorizes cross-site scripting as a weakness where applications fail to properly encode or validate user input before including it in dynamically generated web pages. The flaw essentially permits the execution of malicious scripts in the context of the victim's browser session, potentially compromising the administrative interface and the entire meeting server infrastructure.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform a wide range of malicious activities within the administrative context. An attacker who successfully exploits this vulnerability could potentially escalate privileges, modify system configurations, access sensitive meeting data, or even establish persistent backdoors within the WebEx environment. The administrative interface typically contains critical system settings and user management capabilities, making this vulnerability particularly attractive to threat actors seeking long-term access to enterprise communication systems. The potential for privilege escalation and data compromise makes this vulnerability especially dangerous in enterprise environments where WebEx Meetings Server is used for critical business communications. According to ATT&CK framework, this vulnerability maps to T1059.001 (Command and Scripting Interpreter: Visual Basic) and T1566 (Phishing) as attackers could leverage the XSS to deliver malicious payloads to administrators and establish persistent access within the network infrastructure.
Organizations should implement immediate mitigations to address this vulnerability, beginning with applying the latest security patches provided by Cisco as part of their regular security updates. The patching process should be prioritized at the highest level due to the potential for remote code execution and privilege escalation. Network segmentation should be implemented to isolate the WebEx Meetings Server from critical network segments, limiting the potential lateral movement if the vulnerability is exploited. Input validation controls should be strengthened at multiple layers including web application firewalls and application-level defenses to prevent malicious payloads from reaching the administrative interface. Security monitoring should be enhanced to detect suspicious activity within the administrative interface, particularly unusual configuration changes or unexpected user behavior. Regular security assessments and penetration testing should be conducted to identify potential exploitation vectors and ensure that all security controls remain effective against evolving threats. Additionally, administrative access should be restricted to trusted personnel only, with multi-factor authentication implemented where possible to add additional security layers. The vulnerability highlights the importance of maintaining up-to-date security practices and demonstrates the critical need for continuous vulnerability management within enterprise communication systems.