CVE-2023-34669 in CP300+
Summary
by MITRE • 07/17/2023
TOTOLINK CP300+ V5.2cu.7594 contains a Denial of Service vulnerability in function RebootSystem of the file lib/cste_modules/system which can reboot the system.
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Analysis
by VulDB Data Team • 01/08/2026
The vulnerability identified as CVE-2023-34669 affects the TOTOLINK CP300+ router firmware version V5.2cu.7594 and represents a critical denial of service condition within the system's reboot functionality. This issue resides in the lib/cste_modules/system file where the RebootSystem function operates without proper input validation or access controls, creating an exploitable entry point for unauthorized system disruption.
The technical flaw manifests through the RebootSystem function which lacks adequate parameter validation and authentication checks. When this function processes incoming requests to reboot the system, it fails to verify the legitimacy of the request source or validate the parameters provided. This absence of input sanitization creates a condition where malicious actors can trigger system reboots through crafted inputs, potentially leading to persistent service interruption. The vulnerability aligns with CWE-362, which addresses concurrent execution using shared resources, and CWE-770, concerning allocation of resources without limits or throttling, as the system does not enforce rate limiting or access controls on reboot operations.
The operational impact of this vulnerability extends beyond simple service disruption, as unauthorized rebooting can compromise network stability and availability for legitimate users. Network administrators may experience frequent service interruptions that can affect business continuity, particularly in environments where continuous network access is critical. The vulnerability could be exploited by attackers to perform sustained denial of service attacks, potentially causing cascading failures in network infrastructure that relies on the affected device. This weakness also creates opportunities for attackers to disrupt network operations and potentially mask other malicious activities through repeated system restarts.
Mitigation strategies should focus on implementing proper input validation and access control measures within the RebootSystem function. Network administrators should immediately update to the latest firmware version if available, as vendors typically release patches addressing such vulnerabilities. Additional protective measures include implementing network segmentation to limit access to administrative functions, deploying intrusion detection systems to monitor for suspicious reboot activity, and establishing proper network access controls through firewall rules that restrict access to system management interfaces. The ATT&CK framework categorizes this vulnerability under T1499.004 for Network Denial of Service and T1566.001 for Pre-Attack Phase activities, emphasizing the need for proactive network defense measures and proper access control implementation to prevent unauthorized system manipulation.