CVE-2018-21176 Explained : Impact and Mitigation
Learn about CVE-2018-21176, a vulnerability allowing authenticated users to trigger a stack-based buffer overflow in certain NETGEAR devices. Find out affected systems, impacts, and mitigation steps.
An authenticated user can cause a stack-based buffer overflow in certain NETGEAR devices. This vulnerability affects various firmware versions of D6100, R6100, R7500, R7800, R9000, WNDR3700v4, WNDR4300, WNDR4300v2, WNDR4500v3, and WNR2000v5.
Understanding CVE-2018-21176
This CVE describes a stack-based buffer overflow vulnerability in specific NETGEAR devices.
What is CVE-2018-21176?
CVE-2018-21176 is a vulnerability that allows an authenticated user to trigger a stack-based buffer overflow in certain NETGEAR devices.
The Impact of CVE-2018-21176
The vulnerability has a CVSS v3.0 base score of 6.8, indicating a medium severity issue with high impacts on confidentiality, integrity, and availability of the affected systems.
Technical Details of CVE-2018-21176
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability allows an authenticated user to execute a stack-based buffer overflow on specific NETGEAR devices.
Affected Systems and Versions
- D6100 firmware versions prior to 1.0.0.57
- R6100 firmware versions prior to 1.0.1.20
- R7500 firmware versions prior to 1.0.0.122
- R7800 firmware versions prior to 1.0.2.40
- R9000 firmware versions prior to 1.0.2.52
- WNDR3700v4 firmware versions prior to 1.0.2.92
- WNDR4300 firmware versions prior to 1.0.2.94
- WNDR4300v2 firmware versions prior to 1.0.0.50
- WNDR4500v3 firmware versions prior to 1.0.0.50
- WNR2000v5 firmware versions prior to 1.0.0.62
Exploitation Mechanism
The vulnerability can be exploited by an authenticated user to trigger a stack-based buffer overflow on the affected NETGEAR devices.
Mitigation and Prevention
Protecting systems from CVE-2018-21176 requires specific actions.
Immediate Steps to Take
- Update the firmware of the affected NETGEAR devices to versions that address the vulnerability.
- Restrict network access to the devices to authorized users only.
Long-Term Security Practices
- Regularly monitor for security advisories and updates from NETGEAR.
- Implement strong authentication mechanisms to prevent unauthorized access.
Patching and Updates
- Apply patches and firmware updates provided by NETGEAR to mitigate the CVE-2018-21176 vulnerability.