CVE-2023-51732 in Skyworth Router CM5100
Summary
by MITRE • 01/17/2024
This vulnerability exist in Skyworth Router CM5100, version 4.1.1.24, due to insufficient validation of user supplied input for the IPsec Tunnel Name parameter at its web interface. A remote attacker could exploit this vulnerability by supplying specially crafted input to the parameter at the web interface of the vulnerable targeted system.
Successful exploitation of this vulnerability could allow the attacker to perform stored XSS attacks on the targeted system.
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Analysis
by VulDB Data Team • 02/10/2024
The CVE-2023-51732 vulnerability resides within the Skyworth Router CM5100 firmware version 4.1.1.24, representing a critical security flaw in the device's web interface configuration. This vulnerability specifically targets the IPsec Tunnel Name parameter, which serves as an entry point for malicious input manipulation. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize or filter user-supplied data before processing, creating an exploitable condition that can be leveraged by remote attackers without requiring authentication or physical access to the device.
The technical implementation of this vulnerability aligns with CWE-79, which describes cross-site scripting flaws that occur when untrusted data is incorporated into web pages without proper validation or encoding. The router's web interface accepts the IPsec Tunnel Name parameter directly from user input without implementing adequate sanitization measures, allowing malicious payloads to be stored within the device's configuration system. This stored data is subsequently served to other users who access the router's web interface, enabling attackers to inject malicious scripts that execute in the context of other users' browsers. The vulnerability operates through a classic stored XSS attack vector where the malicious input persists in the system and affects subsequent users who interact with the vulnerable web interface.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with persistent access to the router's administrative interface through compromised user sessions. Attackers can leverage this vulnerability to execute arbitrary code within the browser context of authenticated users, potentially gaining full administrative control over the router configuration. This includes the ability to modify network settings, configure new IPsec tunnels, access sensitive configuration data, and establish persistent backdoors within the network infrastructure. The remote exploitation capability means that attackers can target vulnerable devices from anywhere on the internet, making this vulnerability particularly dangerous for enterprise networks that rely on consumer-grade routers for network segmentation and security.
Mitigation strategies for CVE-2023-51732 should prioritize immediate firmware updates from Skyworth to address the input validation deficiencies in the web interface. Network administrators should implement network segmentation to isolate critical systems from potentially compromised routers, while also deploying web application firewalls to detect and block malicious XSS payloads. Additionally, regular security audits of network infrastructure should include verification of router firmware versions and configuration settings to ensure that all devices are running patched versions. The vulnerability's classification under ATT&CK technique T1566.001 highlights the importance of implementing defense-in-depth strategies that include user access controls, network monitoring, and regular vulnerability assessments to prevent exploitation of similar input validation flaws in other network devices. Organizations should also consider implementing automated patch management systems to ensure timely deployment of security updates across all network infrastructure components.