Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a critical vulnerability in Tenda 5G03 routers, specifically related to command injection. The issue allows for unauthorized control over the device through a network connection. The main concern is confirming the relevance and exposure of this technology within your infrastructure.
- Unauthenticated remote attackers can inject commands.
- Matters because network edge devices are prime targets.
- Assess if Tenda 5G03 routers are in use.
Attack Path
How an attacker could exploit the issue
An attacker can exploit this vulnerability by sending a specially crafted request to the router's web interface. This request would target the `action_ims_on_with_apn` function and abuse the `ims_apn` parameter to inject malicious commands. Successfully executing these commands could allow an attacker to gain high privileges on the device, potentially leading to unauthorized access and control.
- No authentication or user interaction needed.
- Triggered via a web request with a malicious parameter.
- Allows full device compromise.
Live Threat
Current exploitation, exposure, and threat context
A command injection vulnerability in the `action_ims_on_with_apn` function, when triggered via the `ims_apn` parameter, could allow an unauthenticated attacker to execute arbitrary commands on the affected device. This could impact the device's behavior and potentially expose system data.
- System data and device control at risk.
- Exploited remotely via a specific parameter.
- Compromised device behavior and potential data exposure.
Operational Fix
Recommended remediation, mitigation, and detection steps
This critical command injection vulnerability in Tenda 5G03 routers requires immediate attention from the infrastructure or network security team responsible for managing edge devices. The first practical step is to identify all deployed instances of this router, determine their internet reachability and business criticality, and then coordinate with the vendor for a permanent fix.
- Network/Infrastructure teams own the issue.
- Verify router deployment and internet exposure.
- Plan vendor coordination and remediation.
