CVE-2018-21189 : Exploit Details and Defense Strategies
Learn about CVE-2018-21189, a stack-based buffer overflow vulnerability affecting certain NETGEAR devices. Find out the impacted systems, exploitation details, and mitigation steps.
Authenticated users can exploit a stack-based buffer overflow vulnerability in certain models of NETGEAR devices.
Understanding CVE-2018-21189
This CVE affects various NETGEAR devices due to a stack-based buffer overflow vulnerability.
What is CVE-2018-21189?
- Authenticated users can trigger a stack-based buffer overflow on specific NETGEAR devices.
- Devices impacted include D6100, R6100, R7800, R9000, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5.
The Impact of CVE-2018-21189
- CVSS Score: 6.8 (Medium Severity)
- Attack Complexity: Low
- Attack Vector: Adjacent Network
- Availability Impact: High
- Confidentiality Impact: High
- Integrity Impact: High
- Privileges Required: High
- User Interaction: None
Technical Details of CVE-2018-21189
This section provides detailed technical information about the vulnerability.
Vulnerability Description
- The vulnerability is a stack-based buffer overflow.
Affected Systems and Versions
- D6100 devices running firmware version 1.0.0.57 or earlier
- R6100 devices running firmware version 1.0.1.20 or earlier
- R7800 devices running firmware version 1.0.2.40 or earlier
- R9000 devices running firmware version 1.0.2.52 or earlier
- WNDR3700v4 devices running firmware version 1.0.2.92 or earlier
- WNDR4300 devices running firmware version 1.0.2.94 or earlier
- WNDR4300v2 devices running firmware version 1.0.0.50 or earlier
- WNDR4500v3 devices running firmware version 1.0.0.50 or earlier
- WNR2000v5 devices running firmware version 1.0.0.62 or earlier
Exploitation Mechanism
- Attackers need to be authenticated users to exploit the vulnerability.
Mitigation and Prevention
Protect your systems from CVE-2018-21189 with these steps:
Immediate Steps to Take
- Update affected devices to the latest firmware version.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Implement strong authentication mechanisms.
- Regularly conduct security assessments and audits.
Patching and Updates
- Stay informed about security advisories from NETGEAR.