CVE-2020-15633 : Security Advisory and Response

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link routers with firmware 1.20B10_BETA.

Understanding CVE-2020-15633

This CVE identifies a critical security flaw in D-Link routers that enables attackers to bypass authentication and execute code on the device.

What is CVE-2020-15633?

The vulnerability allows network-adjacent attackers to bypass authentication on D-Link routers with firmware 1.20B10_BETA by exploiting a flaw in handling HNAP requests.

The Impact of CVE-2020-15633

CVSS Score: 8.8 (High)
Attack Vector: Adjacent Network
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Attackers can escalate privileges and execute code within the router without requiring authentication.

Technical Details of CVE-2020-15633

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw exists in the incorrect string matching logic when accessing protected pages, allowing attackers to bypass authentication.

Affected Systems and Versions

Product: Multiple Routers
Vendor: D-Link
Affected Version: 1.20B10_BETA

Exploitation Mechanism

Attackers exploit the vulnerability by sending crafted HNAP requests to the router, enabling them to bypass authentication and execute malicious code.

Mitigation and Prevention

Protect your systems from CVE-2020-15633 by following these mitigation strategies.

Immediate Steps to Take

Update the router firmware to the latest version provided by D-Link.
Implement network segmentation to limit exposure to adjacent network attacks.

Long-Term Security Practices

Regularly monitor for security advisories and updates from D-Link.
Conduct security assessments to identify and remediate vulnerabilities proactively.

Patching and Updates

Apply patches and firmware updates promptly to address known security issues and protect against exploitation.