CVE-2013-6964 in WebEx Meeting Center
Summary
by MITRE
Cisco WebEx Meeting Center allows remote authenticated users to bypass access control and inject content from a different WebEx site via unspecified vectors, aka Bug ID CSCul36197.
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Analysis
by VulDB Data Team • 12/22/2024
The vulnerability identified as CVE-2013-6964 represents a critical access control bypass flaw within Cisco WebEx Meeting Center software that enables remote authenticated attackers to execute unauthorized content injection across different WebEx sites. This vulnerability stems from insufficient validation mechanisms that fail to properly verify the origin and authenticity of content being processed within the meeting environment. The flaw allows malicious actors with valid credentials to manipulate the system's trust boundaries and inject content that appears to originate from legitimate WebEx sites, effectively breaking the isolation between different organizational meeting environments. The unspecified vectors suggest that the vulnerability could potentially be exploited through multiple attack pathways within the WebEx infrastructure, making it particularly concerning for organizations relying on the platform for secure collaboration.
From a technical perspective, this vulnerability operates at the intersection of web application security and cross-site request forgery principles, where the system fails to adequately validate the source context of incoming data streams. The flaw likely resides in the content processing pipeline where meeting participants' contributions are validated and rendered, potentially allowing attackers to inject malicious content that bypasses normal access controls. The vulnerability's classification as an access control bypass aligns with CWE-284 which addresses improper access control mechanisms, while the content injection aspect maps to CWE-94 which deals with code injection vulnerabilities. The ability to inject content from different WebEx sites indicates a breakdown in the platform's site isolation mechanisms, potentially allowing attackers to perform cross-site scripting attacks or execute malicious code within the context of other organizations' meetings.
The operational impact of CVE-2013-6964 extends beyond simple unauthorized access, as it enables attackers to manipulate meeting content in ways that could compromise sensitive information shared during business meetings. Organizations utilizing WebEx for confidential discussions, strategic planning sessions, or proprietary content sharing face significant risks when this vulnerability is exploited. The attack could result in the injection of malicious links, phishing content, or content that appears to originate from trusted sources within the organization's meeting ecosystem. This type of vulnerability particularly affects enterprises that rely on WebEx for secure collaboration, as it undermines the trust model that organizations depend upon when conducting sensitive business communications. The attack vector requires only authenticated access, meaning that even a compromised legitimate user account could potentially be leveraged to exploit this vulnerability and compromise other participants in the same WebEx environment.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and content sanitization mechanisms within the WebEx Meeting Center platform. Organizations should ensure that all content processing pipelines include strict validation of source contexts and implement proper isolation between different WebEx sites to prevent cross-site contamination. The recommended approach includes deploying network segmentation controls to limit access to WebEx services, implementing multi-factor authentication to reduce the risk of credential compromise, and establishing regular security audits of the WebEx environment to identify potential exploitation vectors. Security teams should also consider implementing monitoring solutions that can detect anomalous content injection patterns within meeting sessions. The vulnerability's nature suggests that patch management is critical, as Cisco would have likely addressed this through software updates that strengthen the access control mechanisms and content validation processes within the WebEx platform. Organizations should also consider implementing the principle of least privilege for WebEx access, ensuring that users only have access to the specific meeting resources necessary for their roles, thereby limiting the potential impact of credential compromise or exploitation attempts.