CVE-2019-18852 : Vulnerability Insights and Analysis
Learn about CVE-2019-18852 affecting D-Link devices, allowing unauthorized TELNET access. Find out impacted models and steps for mitigation and prevention.
Certain D-Link devices have a hardcoded Alphanetworks user account with TELNET access due to the presence of specific files. This vulnerability affects various D-Link models such as DIR-600 B1 V2.01, DIR-890L A1 v1.03, DIR-615 J1 v100, DIR-645 A1 v1.03, DIR-815 A1 v1.01, DIR-823 A1 v1.01, and DIR-842 C1 v3.00.
Understanding CVE-2019-18852
This CVE identifies a critical security issue in D-Link devices that allows unauthorized TELNET access.
What is CVE-2019-18852?
Certain D-Link devices contain a hardcoded Alphanetworks user account with TELNET access due to specific file configurations.
The Impact of CVE-2019-18852
The presence of this vulnerability can lead to unauthorized access to affected D-Link devices, compromising their security and potentially exposing sensitive information.
Technical Details of CVE-2019-18852
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from the existence of a built-in Alphanetworks user account with TELNET access in certain D-Link devices, facilitated by the presence of specific files.
Affected Systems and Versions
- Models affected include DIR-600 B1 V2.01, DIR-890L A1 v1.03, DIR-615 J1 v100, DIR-645 A1 v1.03, DIR-815 A1 v1.01, DIR-823 A1 v1.01, and DIR-842 C1 v3.00.
Exploitation Mechanism
Unauthorized users can exploit this vulnerability to gain TELNET access to the affected D-Link devices, potentially compromising their security.
Mitigation and Prevention
Protecting systems from CVE-2019-18852 requires immediate action and long-term security measures.
Immediate Steps to Take
- Disable TELNET access on affected D-Link devices if possible.
- Monitor network traffic for any suspicious activity.
- Implement strong password policies for all accounts.
Long-Term Security Practices
- Regularly update firmware on D-Link devices to patch known vulnerabilities.
- Conduct security audits to identify and address any potential weaknesses.
Patching and Updates
- Check for firmware updates provided by D-Link to address the CVE-2019-18852 vulnerability.