CVE-2021-46314 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-46314, a Remote Command Execution vulnerability in D-Link Router DIR-846, allowing attackers to execute commands. Learn how to mitigate the risk and prevent exploitation.
A Remote Command Execution (RCE) vulnerability exists in HNAP1/control/SetNetworkTomographySettings.php of D-Link Router DIR-846 DIR846A1_FW100A43.bin and DIR846enFW100A53DLA-Retail.bin
Understanding CVE-2021-46314
What is CVE-2021-46314?
A Remote Command Execution (RCE) vulnerability allows for command injection via backticks in the D-Link Router DIR-846 firmware.
The Impact of CVE-2021-46314
The vulnerability permits threat actors to execute commands through domain name validation, posing a severe security risk.
Technical Details of CVE-2021-46314
Vulnerability Description
The flaw resides in SetNetworkTomographySettings.php, enabling command injection leveraging backticks for domain name checks.
Affected Systems and Versions
- Product: D-Link Router DIR-846
- Versions: DIR846A1_FW100A43.bin, DIR846enFW100A53DLA-Retail.bin
Exploitation Mechanism
The vulnerability arises from insufficient input validation, permitting malicious command injection.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches or updates issued by D-Link promptly.
- Implement firewall rules to restrict access to vulnerable services.
Long-Term Security Practices
- Conduct regular security assessments and penetration testing.
- Educate users on secure coding practices to prevent command injection vulnerabilities.
Patching and Updates
Regularly check and apply firmware updates from D-Link to address security gaps.