CVE-2020-15636 Explained : Impact and Mitigation

This vulnerability allows remote attackers to execute arbitrary code on affected installations of NETGEAR routers with specific firmware. Authentication is not required to exploit this vulnerability.

Understanding CVE-2020-15636

This CVE identifies a critical vulnerability in NETGEAR routers that can be exploited by remote attackers to execute malicious code.

What is CVE-2020-15636?

The vulnerability allows attackers to trigger a stack-based buffer overflow in the check_ra service of NETGEAR routers, leading to the execution of arbitrary code with root privileges.

The Impact of CVE-2020-15636

The impact of this vulnerability is rated as high, with a CVSS base score of 8.1. It affects confidentiality, integrity, and availability of the targeted systems.

Technical Details of CVE-2020-15636

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The flaw exists within the check_ra service of NETGEAR routers. By crafting a specific raePolicyVersion in a RAE_Policy.json file, attackers can trigger a stack-based buffer overflow.

Affected Systems and Versions

Product: Multiple Routers
Vendor: NETGEAR
Firmware Version: 1.0.4.84_10.0.58

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Privileges Required: None
User Interaction: None
Scope: Unchanged
Exploitation can be achieved remotely without authentication.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate action and long-term security practices.

Immediate Steps to Take

Apply patches and updates provided by NETGEAR promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update firmware and security patches for all network devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Refer to the official NETGEAR security advisory for detailed instructions on patching the affected routers.