CVE-2020-27863 : Security Advisory and Response

This CVE-2020-27863 article provides insights into a vulnerability affecting D-Link routers, allowing attackers to disclose sensitive information without authentication.

Understanding CVE-2020-27863

This CVE involves an authentication bypass vulnerability in D-Link routers, potentially leading to the exposure of stored credentials.

What is CVE-2020-27863?

The vulnerability enables network-adjacent attackers to access sensitive data on D-Link DVA-2800 and DSL-2888A routers without authentication.
The flaw resides in the dhttpd service on TCP port 8008 due to incorrect string matching logic.
Attackers can exploit this issue to reveal credentials, posing a risk of further compromise.

The Impact of CVE-2020-27863

CVSS Base Score: 6.5 (Medium Severity)
Confidentiality Impact: High
Attack Vector: Adjacent Network
Privileges Required: None
User Interaction: None

Technical Details of CVE-2020-27863

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability allows unauthorized disclosure of sensitive data on affected D-Link routers.

Affected Systems and Versions

Affected Product: Multiple Routers
Vendor: D-Link
Affected Version: Firmware version 2.3

Exploitation Mechanism

Attackers exploit the flaw in the dhttpd service on TCP port 8008 to bypass authentication and access protected pages.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2020-27863.

Immediate Steps to Take

Update router firmware to the latest version provided by D-Link.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Implement strong network segmentation to limit access to critical systems.
Regularly review and update router configurations to enhance security.

Patching and Updates

Stay informed about security advisories from D-Link and apply patches promptly.