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Motorola MR2600 Router Vulnerable to Unauthenticated RCE Attack

Aggregated by BrevFeed security · updated 1h ago
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A remote code execution vulnerability has been discovered in Motorola’s MR2600 router, allowing attackers to upload malicious firmware without authentication. This flaw poses significant risks to users, as it can lead to unauthorized access and control of the device.

Key points

Discovery of Vulnerability

An unauthenticated remote code execution (RCE) vulnerability was identified in Motorola’s MR2600 router. The discovery came during an investigation into various router vendors, and the MR2600 was found to have a significant security fault in its firmware process.

How the Vulnerability Works

The MR2600 router does not publicly distribute firmware, opting for over-the-air updates. However, the last firmware version (v1.0.22) was accessible for analysis. The flaw lies in the router's update procedure, which was designed to authenticate updates but failed to enforce proper validation.

Technical Flaw in Firmware Update Process

When an update is initiated via the '/WEBCGI1/prog.fcgi?method=/cgi-bin/fwupload.cgi' POST endpoint, the router checks for specific magic numbers in the firmware file. However, due to poor implementation, an attacker can upload a malicious firmware image as raw data, bypassing the authentication check.

Implications of the Vulnerability

This flaw allows unauthenticated users to potentially take control of the router by uploading custom firmware, creating severe security vulnerabilities for users. The incident highlights the importance of robust security measures in device firmware updates.

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Primary sources

GitHub janraasch/hugo-bearblog

Reporting from

A remote code execution vulnerability has been discovered in Motorola’s MR2600 router, allowing attackers to upload malicious firmware without authentication. This flaw poses significant risks to users, as it can lead to unauthorized access and control of the device.