CVE-2021-45516 Explained : Impact and Mitigation
Learn about CVE-2021-45516 affecting certain NETGEAR routers, leading to denial of service. Impacting models like R6400, R7000, R6900P, and more. Find mitigation steps here.
Certain NETGEAR devices are affected by a denial of service vulnerability, impacting various router models. This CVE has a CVSS base score of 6.9.
Understanding CVE-2021-45516
This CVE affects multiple NETGEAR router models before specific firmware versions, leading to a denial of service vulnerability.
What is CVE-2021-45516?
CVE-2021-45516 is a vulnerability that affects NETGEAR routers, such as R6400, R7000, R6900P, R7000P, R8000, RBK852, RBR850, and RBS850, before certain firmware versions.
The Impact of CVE-2021-45516
The denial of service vulnerability in the affected NETGEAR devices can result in a high impact on availability, with a base severity rating of MEDIUM.
Technical Details of CVE-2021-45516
This section delves into the technical specifics of the CVE.
Vulnerability Description
The vulnerability allows an attacker in the adjacent network to trigger a denial of service condition, requiring high privileges but no user interaction. It has a CVSS base score of 6.9.
Affected Systems and Versions
- R6400 before 1.0.1.70
- R7000 before 1.0.11.126
- R6900P before 1.3.3.140
- R7000P before 1.3.3.140
- R8000 before 1.0.4.74
- RBK852 before 3.2.10.11
- RBR850 before 3.2.10.11
- RBS850 before 3.2.10.11
Exploitation Mechanism
The attack complexity is LOW, with an attack vector of ADJACENT_NETWORK. The exploitation results in a changed scope of impact.
Mitigation and Prevention
Steps to address and prevent the CVE.
Immediate Steps to Take
- Update affected devices to the latest firmware versions provided by NETGEAR.
- Ensure access control lists are implemented to restrict network access.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update firmware to address known vulnerabilities.
- Conduct security assessments on network devices periodically.
- Educate users on identifying and reporting suspicious network activity.
Patching and Updates
The vendor has released patches for the impacted devices. It is crucial to apply these patches promptly to mitigate the risk of exploitation.