Horizon Alert
Summary of the vulnerability and why it matters
This advisory details a critical vulnerability in Tenda AC6 router firmware that could allow unauthorized attackers to gain complete control of affected devices without needing any prior access or credentials. The nature of this flaw means it could be exploited remotely, posing a significant risk to network security if not addressed.
- Remote attackers could fully control routers.
- Confirms a critical risk to internet-connected devices.
- Assess exposure and confirm if affected.
Attack Path
How an attacker could exploit the issue
Attackers can exploit this vulnerability by sending specially crafted network requests to a Tenda AC6 router. The router's 'fromSetSysTime' function is susceptible to a buffer overflow, which can be triggered without any authentication or user interaction. Successful exploitation could allow an attacker to execute arbitrary code on the device, potentially leading to complete compromise.
- No authentication required for attack.
- Triggered via network request to a specific function.
- Risk of code execution and device compromise.
Live Threat
Current exploitation, exposure, and threat context
A buffer overflow vulnerability in the `fromSetSysTime` function could allow an unauthenticated attacker to execute arbitrary code. This could affect the device's ability to manage system time when accessed over the network.
- Device time management data.
- Network access to the function.
- Potential for unauthorized code execution.
Operational Fix
Recommended remediation, mitigation, and detection steps
The Tenda AC6 firmware vulnerability, a critical buffer overflow, likely affects network infrastructure or IoT device management teams. The first step is to identify all deployed AC6 devices, confirm their internet exposure and business criticality, and then assign ownership for remediation planning.
- Assign ownership to network infrastructure teams.
- Verify internet-facing AC6 device exposure.
- Plan remediation based on identified risk.
