CVE-2015-0590 in WebEx Meeting Center
Summary
by MITRE
Cisco WebEx Meeting Center allows remote attackers to activate disabled meeting attributes, and consequently obtain sensitive information, by providing crafted parameters during a meeting-join action, aka Bug ID CSCuo34165.
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Analysis
by VulDB Data Team • 03/08/2022
The vulnerability described in CVE-2015-0590 represents a critical access control flaw within Cisco WebEx Meeting Center that undermines the security posture of enterprise collaboration platforms. This issue specifically targets the meeting attribute validation mechanisms that are designed to prevent unauthorized access to sensitive meeting features and data. The vulnerability exists in the web-based meeting management system that allows organizations to conduct virtual meetings, share screens, and collaborate remotely through Cisco's WebEx platform. When users join meetings through the WebEx Meeting Center, the system should enforce strict access controls to ensure that only authorized participants can access specific meeting attributes and features.
The technical exploitation of this vulnerability occurs when remote attackers manipulate the parameters sent during the meeting-join action process. This manipulation allows malicious actors to bypass the intended restrictions that would normally disable certain meeting attributes for participants who should not have access to them. The flaw stems from insufficient input validation and parameter sanitization within the meeting join mechanism, where the system fails to properly verify that the attributes being requested are appropriate for the user's role and permissions. This weakness creates a path for attackers to activate disabled meeting features that should be restricted to meeting organizers or specific authorized participants, thereby enabling them to access sensitive information that would normally be protected.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass potential data breaches and unauthorized access to confidential business information. Attackers can exploit this flaw to gain access to meeting recordings, participant lists, shared documents, and other sensitive materials that are typically restricted to specific user roles. The vulnerability particularly affects organizations that rely heavily on WebEx for secure business communications, as it undermines the fundamental security assumptions that users make when participating in meetings. The attack vector is particularly concerning because it requires minimal privileges to exploit and can be executed remotely without requiring physical access to the network or system.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-284, which addresses improper access control, and relates to ATT&CK technique T1078 for valid accounts and T1566 for social engineering. Organizations using Cisco WebEx Meeting Center face significant risk when this vulnerability remains unpatched, as it creates a persistent backdoor that can be exploited repeatedly. The vulnerability demonstrates how seemingly minor flaws in parameter validation can create substantial security gaps in enterprise collaboration systems. The impact is amplified because meeting attributes often contain sensitive business information, including proprietary data, strategic discussions, and confidential communications that organizations rely on maintaining secrecy.
Mitigation strategies for this vulnerability should include immediate application of Cisco's security patches and updates that address the parameter validation issues in the meeting join mechanism. Organizations should also implement network monitoring to detect anomalous meeting join patterns that might indicate exploitation attempts. Access control policies should be reviewed and strengthened to ensure that meeting attributes are properly restricted based on user roles and permissions. Additionally, security teams should consider implementing additional layers of authentication and authorization checks for meeting participation, particularly for sensitive or high-value meetings. The vulnerability highlights the importance of thorough input validation and parameter sanitization in web applications, as well as the need for comprehensive security testing of collaboration platforms that handle sensitive business data.