CVE-2018-21191 Explained : Impact and Mitigation
Learn about CVE-2018-21191, a vulnerability in certain NETGEAR devices allowing authenticated users to trigger a stack-based buffer overflow. Find mitigation steps and preventive measures.
An authenticated user can exploit a stack-based buffer overflow vulnerability in certain NETGEAR devices. This vulnerability affects models such as D6100, R6100, R7800, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5.
Understanding CVE-2018-21191
This CVE involves a stack-based buffer overflow vulnerability in specific NETGEAR devices.
What is CVE-2018-21191?
CVE-2018-21191 is a vulnerability that allows an authenticated user to trigger a stack-based buffer overflow in certain NETGEAR devices.
The Impact of CVE-2018-21191
- 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-2018-21191
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability allows an authenticated user to exploit a stack-based buffer overflow in certain NETGEAR devices.
Affected Systems and Versions
The following models are affected:
- D6100 (before version 1.0.0.57)
- R6100 (before version 1.0.1.20)
- R7800 (before version 1.0.2.40)
- WNDR3700v4 (before version 1.0.2.92)
- WNDR4300 (before version 1.0.2.94)
- WNDR4300v2 (before version 1.0.0.50)
- WNDR4500v3 (before version 1.0.0.50)
- WNR2000v5 (before version 1.0.0.62)
Exploitation Mechanism
The vulnerability can be exploited by an authenticated user to trigger a stack-based buffer overflow in the affected NETGEAR devices.
Mitigation and Prevention
Protecting systems from CVE-2018-21191 is crucial to maintaining security.
Immediate Steps to Take
- Update the firmware of the affected devices to the patched versions.
- Implement strong authentication mechanisms to prevent unauthorized access.
Long-Term Security Practices
- Regularly monitor for security advisories and updates from NETGEAR.
- Conduct security assessments and penetration testing to identify vulnerabilities.
Patching and Updates
- Apply patches provided by NETGEAR promptly to address the CVE-2018-21191 vulnerability.