CVE-2022-29639 : Exploit Details and Defense Strategies

TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 were found to have a command injection vulnerability through the magicid parameter in the uci_cloudupdate_config function.

Understanding CVE-2022-29639

This section provides comprehensive details about the CVE-2022-29639 vulnerability.

What is CVE-2022-29639?

The CVE-2022-29639 vulnerability exists in TOTOLINK A3100R routers, specifically in versions V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129. It allows threat actors to execute arbitrary commands via the magicid parameter in the uci_cloudupdate_config function.

The Impact of CVE-2022-29639

The vulnerability poses a significant risk as attackers can exploit it to remotely execute malicious commands on affected routers, compromising the security and integrity of the device and the network.

Technical Details of CVE-2022-29639

In this section, we delve into the technical aspects of the CVE-2022-29639 vulnerability.

Vulnerability Description

The command injection vulnerability in TOTOLINK A3100R routers stems from improper input validation of the magicid parameter in the uci_cloudupdate_config function, allowing unauthorized command execution.

Affected Systems and Versions

Systems running TOTOLINK A3100R router firmware versions V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 are impacted by CVE-2022-29639.

Exploitation Mechanism

Threat actors can exploit this vulnerability by sending crafted requests containing malicious commands via the magicid parameter, potentially leading to unauthorized remote code execution.

Mitigation and Prevention

Learn the necessary measures to mitigate and prevent the CVE-2022-29639 vulnerability.

Immediate Steps to Take

Disable remote access if not required and limit access to trusted IP addresses.
Implement strong and unique passwords for router login credentials.

Long-Term Security Practices

Regularly update router firmware to the latest version provided by TOTOLINK.
Monitor network traffic for any suspicious activity that could indicate an exploitation attempt.

Patching and Updates

Keep abreast of security advisories from TOTOLINK and promptly apply patches and updates to address known vulnerabilities.