CVE-2007-4747 in Video Surveillance Sp Isp
Summary
by MITRE
The telnet service in Cisco Video Surveillance IP Gateway Encoder/Decoder (Standalone and Module) firmware 1.8.1 and earlier, Video Surveillance SP/ISP Decoder Software firmware 1.11.0 and earlier, and the Video Surveillance SP/ISP firmware 1.23.7 and earlier does not require authentication, which allows remote attackers to perform administrative actions, aka CSCsj31729.
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Analysis
by VulDB Data Team • 07/25/2019
The vulnerability described in CVE-2007-4747 represents a critical authentication bypass flaw within Cisco's video surveillance infrastructure products. This weakness affects multiple components including IP Gateway Encoders/Decoders, SP/ISP Decoders, and SP/ISP firmware versions up to specific releases. The core issue lies in the telnet service implementation which fails to enforce proper authentication mechanisms, creating a significant security gap that can be exploited by remote attackers without any credentials.
This vulnerability maps directly to CWE-287, which addresses improper authentication issues in software systems. The flaw allows attackers to execute administrative functions through the telnet interface without providing valid credentials, effectively granting them full control over the affected devices. The impact extends beyond simple unauthorized access as it enables attackers to modify device configurations, access sensitive video streams, and potentially compromise the entire surveillance network. The vulnerability exists in the authentication layer of the telnet service implementation, which should have required proper credential verification before granting administrative privileges.
The operational implications of this vulnerability are severe for organizations relying on Cisco's video surveillance solutions. Remote attackers can exploit this weakness from any network location to gain administrative control over the affected devices, potentially leading to complete network compromise. The lack of authentication requirements means that any attacker with network access can perform critical administrative actions including configuration changes, user management, and access to video feeds. This vulnerability directly aligns with ATT&CK technique T1078 which covers valid accounts and T1566 which covers credential harvesting, though in this case the authentication bypass occurs without credential acquisition.
Organizations should implement immediate mitigations including disabling the telnet service when it is not required for administrative purposes, implementing network segmentation to isolate these devices from general network traffic, and applying the latest firmware updates from Cisco that address this authentication bypass. The recommended approach involves configuring access control lists to restrict telnet access to trusted network segments only, while also enabling alternative secure management protocols such as SSH. Additionally, network monitoring should be enhanced to detect unauthorized telnet connections, and regular security audits should be conducted to verify that authentication mechanisms remain properly configured. The vulnerability underscores the importance of proper authentication implementation in networked devices and the critical need for regular security updates to address known weaknesses in embedded systems.