CVE-2024-7029: Avtech Avm1203 Firmware RCE Vulnerability

CVE-2024-7029 Overview

CVE-2024-7029 is a critical command injection vulnerability affecting AVTECH AVM1203 IP cameras. This firmware-level vulnerability allows attackers to inject and execute arbitrary commands over the network without any authentication requirements. The vulnerability has been observed being actively exploited by threat actors, notably the Corona Mirai botnet variant, to compromise IoT devices and incorporate them into botnet infrastructure.

Critical Impact

Unauthenticated remote attackers can execute arbitrary commands on vulnerable AVTECH AVM1203 devices, potentially leading to complete device compromise, botnet recruitment, and use as a pivot point for further network attacks.

Affected Products

• AVTECH AVM1203 Firmware (all versions)
• AVTECH AVM1203 Hardware

Discovery Timeline

• 2024-08-02 - CVE-2024-7029 published to NVD
• 2024-09-17 - Last updated in NVD database

Technical Details for CVE-2024-7029

Vulnerability Analysis

This vulnerability is classified under CWE-77 (Improper Neutralization of Special Elements used in a Command), commonly known as Command Injection. The vulnerability exists within the AVTECH AVM1203 IP camera firmware and allows network-based attackers to inject malicious commands that are executed by the underlying operating system without requiring any form of authentication.

The attack can be executed remotely over the network with low complexity, requiring only low-level privileges. No user interaction is necessary for exploitation. Successful exploitation results in complete compromise of device confidentiality, integrity, and availability, giving attackers full control over the affected camera system.

Security researchers at Akamai have documented this vulnerability being actively exploited by the Corona Mirai botnet variant, highlighting its use in real-world attack campaigns targeting IoT infrastructure.

Root Cause

The root cause of CVE-2024-7029 lies in improper input validation and sanitization within the AVTECH AVM1203 firmware. User-supplied input is passed directly to system command execution functions without adequate filtering or escaping of special characters. This allows attackers to break out of the intended command context and inject arbitrary shell commands.

The firmware fails to implement proper input validation controls, authentication mechanisms for sensitive functionality, and command execution hardening that would prevent malicious command injection.

Attack Vector

The vulnerability is exploitable over the network without authentication. Attackers can send specially crafted requests to the vulnerable device containing malicious command payloads. These payloads are processed by the firmware without proper sanitization, allowing the injected commands to execute with the privileges of the camera's operating system.

The attack flow typically involves:

1. Identifying vulnerable AVTECH AVM1203 devices exposed to the network
2. Crafting malicious requests containing shell command injection payloads
3. Sending the requests to the target device's web interface or API endpoint
4. Achieving command execution on the underlying Linux-based operating system

This vulnerability is particularly concerning for IoT security as these devices are often deployed on network perimeters with minimal security monitoring, making them attractive targets for botnet operators.

Detection Methods for CVE-2024-7029

Indicators of Compromise

• Unusual outbound network connections from AVTECH camera devices to known botnet command and control infrastructure
• Unexpected processes or services running on the camera's operating system
• Modified firmware files or configuration changes not authorized by administrators
• Network traffic patterns consistent with Mirai botnet communication protocols

Detection Strategies

• Implement network intrusion detection rules to identify command injection patterns in HTTP requests targeting AVTECH devices
• Monitor for anomalous DNS queries and outbound connections from IoT network segments
• Deploy honeypots mimicking vulnerable AVTECH cameras to detect active scanning and exploitation attempts
• Analyze network flow data for indicators of botnet recruitment and lateral movement

Monitoring Recommendations

• Enable comprehensive logging on network firewalls and IDS/IPS systems monitoring IoT device traffic
• Implement network segmentation to isolate IoT devices and monitor inter-segment communication
• Establish baseline behavioral profiles for AVTECH cameras to detect anomalous activity
• Regularly audit exposed services and open ports on IoT network segments

How to Mitigate CVE-2024-7029

Immediate Actions Required

• Isolate affected AVTECH AVM1203 devices from untrusted networks immediately
• Implement strict network access controls limiting connectivity to only authorized management hosts
• Disable remote management interfaces if not operationally required
• Consider replacing vulnerable devices with supported alternatives that receive security updates

Patch Information

At the time of this advisory, AVTECH has not released a firmware update to address CVE-2024-7029. Organizations should refer to the CISA ICS Advisory ICSA-24-214-07 for the latest guidance and monitor vendor communications for potential future patches. Given the lack of available patches, implementing network-level mitigations is critical.

Workarounds

• Place vulnerable devices behind a firewall and restrict network access to trusted IP addresses only
• Implement a VPN for any remote access requirements to the camera system
• Deploy web application firewall (WAF) rules to filter command injection attempts targeting the device
• Consider physical replacement with devices from vendors providing active security support

# Example firewall rules to restrict access to AVTECH cameras
# Allow only trusted management network
iptables -A INPUT -s 192.168.1.0/24 -d <camera_ip> -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -s 192.168.1.0/24 -d <camera_ip> -p tcp --dport 443 -j ACCEPT
# Deny all other inbound connections to camera ports
iptables -A INPUT -d <camera_ip> -p tcp --dport 80 -j DROP
iptables -A INPUT -d <camera_ip> -p tcp --dport 443 -j DROP