CVE-2020-26068 in TelePresence Collaboration Endpoint
Summary
by MITRE • 11/18/2020
A vulnerability in the xAPI service of Cisco Telepresence CE Software and Cisco RoomOS Software could allow an authenticated, remote attacker to generate an access token for an affected device. The vulnerability is due to insufficient access authorization. An attacker could exploit this vulnerability by using the xAPI service to generate a specific token. A successful exploit could allow the attacker to use the generated token to enable experimental features on the device that should not be available to users.
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Analysis
by VulDB Data Team • 12/08/2020
The vulnerability identified as CVE-2020-26068 resides within the xAPI service of Cisco Telepresence CE Software and Cisco RoomOS Software, representing a critical authorization flaw that undermines the security posture of video conferencing systems. This weakness specifically targets the access control mechanisms that should prevent unauthorized users from gaining elevated privileges within the device's operational environment. The vulnerability stems from inadequate validation of user permissions during token generation processes, creating a pathway for authenticated attackers to manipulate system behavior through legitimate service interfaces. The xAPI service, designed for remote system management and configuration, becomes a vector for privilege escalation when proper authorization checks are bypassed.
The technical exploitation of this vulnerability requires an attacker to possess valid authentication credentials for the affected device, which significantly reduces the attack surface but does not eliminate the risk entirely. Once authenticated, the attacker can leverage the xAPI service to generate access tokens that should normally be restricted to administrative users or system processes. This flaw allows unauthorized access to experimental features that are typically disabled for regular users due to their potential instability or security implications. The generated tokens can be used to enable functionalities that may expose additional attack vectors or provide access to system resources that should remain protected. This type of vulnerability aligns with CWE-284, which describes improper access control issues where systems fail to properly enforce access restrictions, and represents a clear violation of the principle of least privilege.
The operational impact of this vulnerability extends beyond simple unauthorized access to include potential system compromise and data exposure risks. When experimental features are enabled through manipulated tokens, they may introduce additional attack surfaces that were not designed for production environments and could contain undiscovered security flaws. The affected devices, commonly deployed in enterprise and organizational settings, could become entry points for more sophisticated attacks if attackers exploit this vulnerability to gain access to network resources. The ability to enable experimental features suggests that the attacker may be able to modify system behavior in ways that could interfere with normal operations or create persistent access mechanisms. This vulnerability particularly affects organizations that rely on secure video conferencing solutions, as it undermines the trust model that should protect their communication infrastructure from unauthorized manipulation.
Mitigation strategies for CVE-2020-26068 should focus on implementing robust access control measures and monitoring for unauthorized token generation activities. Organizations should ensure that all affected devices are updated with the latest security patches provided by Cisco, as these updates typically address the underlying authorization flaws in the xAPI service. Network segmentation and access control policies should be strengthened to limit the scope of impact if an attacker successfully exploits this vulnerability. Continuous monitoring of xAPI service usage and token generation activities can help detect anomalous behavior that may indicate exploitation attempts. Additionally, implementing role-based access controls and regularly reviewing user permissions can reduce the risk of successful exploitation by ensuring that only authorized personnel have access to system management functions. The vulnerability demonstrates the importance of comprehensive access control validation and highlights the need for regular security assessments of management interfaces in networked devices, aligning with ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting through service interfaces.