CVE-2019-18990 : What You Need to Know

Realtek RTL8812AR 1.21WW, RTL8196D 1.0.0, RTL8192ER 2.10, and RTL8881AN 1.09 devices are affected by a vulnerability that allows partial authentication bypass, potentially enabling unauthorized data access or modification.

Understanding CVE-2019-18990

This CVE involves a security vulnerability in Realtek devices that could lead to unauthorized data access.

What is CVE-2019-18990?

The vulnerability allows the transmission of unencrypted data frames to a WPA2-protected WLAN router, potentially enabling attackers to extract information or modify data.

The Impact of CVE-2019-18990

CVSS Base Score: 6.1 (Medium Severity)
Attack Vector: Adjacent Network
Confidentiality Impact: Low
Integrity Impact: Low
Scope: Changed
No user interaction or special privileges required

Technical Details of CVE-2019-18990

Realtek devices are susceptible to a partial authentication bypass vulnerability.

Vulnerability Description

The vulnerability allows the transmission of unencrypted data frames to a WPA2-protected WLAN router, potentially enabling unauthorized data access or modification.

Affected Systems and Versions

Affected Devices: Realtek RTL8812AR 1.21WW, RTL8196D 1.0.0, RTL8192ER 2.10, RTL8881AN 1.09
Versions: Not specified

Exploitation Mechanism

Attackers can exploit this vulnerability by sending unencrypted data frames to the router, which then routes the packet through the network, potentially allowing unauthorized access or data manipulation.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2019-18990.

Immediate Steps to Take

Update affected Realtek devices with security patches if available
Monitor network traffic for any suspicious activities
Implement strong encryption protocols and access controls

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities
Conduct security audits and penetration testing to identify and address potential weaknesses
Educate users on safe browsing habits and security best practices

Patching and Updates

Realtek or device vendors may release patches to address this vulnerability
Stay informed about security advisories and apply patches promptly