CVE-2021-31698 : Security Advisory and Response
Learn about CVE-2021-31698 affecting Quectel EG25-G devices, allowing remote code execution via an AT command. Find out the impact, technical details, and mitigation steps.
Quectel EG25-G devices through 202006130814 are vulnerable to remote code execution by exploiting a specific AT command. This vulnerability allows attackers to execute arbitrary code by inserting shell metacharacters in a particular input of atfwd_daemon.
Understanding CVE-2021-31698
This section will cover the critical aspects of the CVE-2021-31698 vulnerability.
What is CVE-2021-31698?
CVE-2021-31698 involves Quectel EG25-G devices, where an attacker can remotely execute arbitrary code using a specific AT command, exploiting a particular input field in atfwd_daemon.
The Impact of CVE-2021-31698
The vulnerability could allow unauthorized users to run malicious code on affected devices, leading to potential compromise of sensitive data, unauthorized access, and complete system control.
Technical Details of CVE-2021-31698
In this section, we will delve into the technical specifics of CVE-2021-31698.
Vulnerability Description
The flaw in Quectel EG25-G devices enables threat actors to inject and execute arbitrary code by leveraging a vulnerability in the atfwd_daemon input handling mechanism.
Affected Systems and Versions
All Quectel EG25-G devices before version 202006130814 are susceptible to this security issue.
Exploitation Mechanism
By utilizing a specific AT command and manipulating the quectel_handle_fumo_cfg input with shell metacharacters, attackers can gain unauthorized remote code execution capabilities.
Mitigation and Prevention
Protecting your systems from CVE-2021-31698 is crucial to ensure data security and system integrity.
Immediate Steps to Take
- Update the affected Quectel EG25-G devices to the latest firmware version that includes a patch for this vulnerability.
- Implement strong firewall rules to restrict unauthorized access to the devices.
Long-Term Security Practices
- Regularly monitor and audit AT commands and input handling mechanisms for anomalies.
- Conduct security assessments and penetration testing to identify and address potential vulnerabilities.
Patching and Updates
Stay informed about security advisories from Quectel and apply relevant patches promptly to mitigate the risk of exploitation of CVE-2021-31698.