Remote Code Execution in Comfast CF-WR630AX

Executive Summary

This vulnerability is in Comfast CF-WR630AX router firmware version 2.7.0.2. It allows a remote attacker to execute arbitrary code by exploiting specific parameters in certain system files and CGI scripts.

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Detection Guidance

To detect this vulnerability, check if your Comfast CF-WR630AX device is running version v.2.7.0.2. Inspect network traffic for suspicious requests targeting /usr/bin/webmgnt, /cgi-bin/mbox-config, or parameters like timestr and display_n. Use commands like curl or wget to probe these endpoints for unexpected responses.

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Impact Analysis

An attacker could gain control of the router, allowing them to intercept network traffic, install malware, or use the device as part of a botnet. This could lead to data theft, unauthorized access to connected devices, or disruption of network services.

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Compliance Impact

This vulnerability allows remote attackers to execute arbitrary code on the affected device, which could lead to unauthorized access and data breaches. Such breaches may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security) by exposing sensitive information.

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Mitigation Strategies

Immediately update the Comfast CF-WR630AX firmware to the latest version to address the arbitrary code execution vulnerability. Disable remote access to web management interfaces if not required. Monitor network traffic for unusual activity targeting /usr/bin/webmgnt or /cgi-bin/mbox-config endpoints.

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