Horizon Alert
Summary of the vulnerability and why it matters
This critical vulnerability affects Tenda TX9 V22.03.02.05 firmware, impacting a function within its network control list settings. A successful exploit could allow an attacker to remotely compromise the device, potentially leading to widespread disruption. The main concern is confirming relevance and exposure to understand any potential business impact.
- Network control list flaw allows remote takeover.
- Consumer routers are often internet-facing.
- Assess exposure to understand potential risk.
Attack Path
How an attacker could exploit the issue
A remote attacker could reach the Tenda TX9 router's web interface and trigger a stack overflow vulnerability by sending a crafted request to the `/goform/SetNetControlList` endpoint. This vulnerability exists within the `sub_4418CC` function and, if successfully triggered, could lead to denial of service or other unintended system behavior.
- Network access required.
- Triggered via SetNetControlList.
- Risk of denial of service.
Live Threat
Current exploitation, exposure, and threat context
A stack overflow in the `SetNetControlList` function could allow an unauthenticated remote attacker to execute arbitrary code on the device. This could impact the confidentiality, integrity, and availability of the affected system.
- System configuration data at risk.
- Unauthenticated network access enables overflow.
- Potential for full device compromise.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in Tenda TX9 firmware is likely to impact end-users or organizations deploying these devices for network access. The primary action required is to identify all instances of the affected firmware, confirm their exposure and criticality, and then coordinate remediation efforts, potentially involving vendor support.
- Network and IT infrastructure owners.
- Verify device exposure and business criticality.
- Plan vendor-assisted firmware updates.
