CVE-2018-21146 Explained : Impact and Mitigation
Learn about CVE-2018-21146 affecting NETGEAR devices. Find out the impact, affected versions, and mitigation steps for this command injection vulnerability.
A vulnerability in specific NETGEAR devices allows an authenticated user to execute command injection.
Understanding CVE-2018-21146
What is CVE-2018-21146?
Certain NETGEAR devices are susceptible to command injection by authenticated users, affecting various versions of D7800, R7800, R8900, R9000, WNDR4300v2, and WNDR4500v3.
The Impact of CVE-2018-21146
The vulnerability has a CVSS base score of 6.8, with high impacts on confidentiality, integrity, and availability. It requires high privileges but no user interaction.
Technical Details of CVE-2018-21146
Vulnerability Description
The vulnerability allows authenticated users to perform command injection on affected NETGEAR devices.
Affected Systems and Versions
- D7800 versions before 1.0.1.34
- R7800 versions before 1.0.2.42
- R8900 versions before 1.0.3.10
- R9000 versions before 1.0.3.10
- WNDR4300v2 versions before 1.0.0.54
- WNDR4500v3 versions before 1.0.0.54
Exploitation Mechanism
The attack complexity is low, with an adjacent network attack vector. The vulnerability has a high impact on availability, confidentiality, and integrity.
Mitigation and Prevention
Immediate Steps to Take
- Update affected devices to the latest firmware versions.
- Restrict network access to vulnerable devices.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update firmware and security patches.
- Implement strong authentication mechanisms.
- Conduct security audits and penetration testing.
Patching and Updates
Apply patches provided by NETGEAR to address the command injection vulnerability.