CVE-2018-19987 : Vulnerability Insights and Analysis

D-Link DIR-822 Rev.B 202KRb06, DIR-822 Rev.C 3.10B06, DIR-860L Rev.B 2.03.B03, DIR-868L Rev.B 2.05B02, DIR-880L Rev.A 1.20B01_01_i3se_BETA, and DIR-890L Rev.A 1.21B02_BETA devices are affected by a mishandling issue with the IsAccessPoint parameter in the /HNAP1/SetAccessPointMode function, leading to command injection.

Understanding CVE-2018-19987

This CVE involves a vulnerability in D-Link devices that can be exploited through a specific parameter mishandling, resulting in command injection.

What is CVE-2018-19987?

The vulnerability arises from a lack of regular expression checking in the source code, allowing malicious XML messages to trigger command injection by including shell metacharacters in the IsAccessPoint element.

The Impact of CVE-2018-19987

The mishandling of the IsAccessPoint parameter can lead to unauthorized command execution on affected D-Link devices, potentially compromising their security and integrity.

Technical Details of CVE-2018-19987

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from the improper handling of the IsAccessPoint parameter in the /HNAP1/SetAccessPointMode function, enabling command injection through malicious XML messages.

Affected Systems and Versions

D-Link DIR-822 Rev.B 202KRb06
D-Link DIR-822 Rev.C 3.10B06
D-Link DIR-860L Rev.B 2.03.B03
D-Link DIR-868L Rev.B 2.05B02
D-Link DIR-880L Rev.A 1.20B01_01_i3se_BETA
D-Link DIR-890L Rev.A 1.21B02_BETA

Exploitation Mechanism

The vulnerability allows attackers to inject commands by manipulating the IsAccessPoint parameter in the XML message, potentially leading to unauthorized access and control of the affected devices.

Mitigation and Prevention

To address CVE-2018-19987, immediate steps and long-term security practices are crucial.

Immediate Steps to Take

Disable remote access to the affected D-Link devices if not required.
Monitor network traffic for any suspicious activity or unauthorized access attempts.
Apply vendor-supplied patches or updates as soon as they are available.

Long-Term Security Practices

Regularly update firmware and software on all network devices to mitigate known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential security breaches.

Patching and Updates

Stay informed about security advisories from D-Link and apply patches promptly to address identified vulnerabilities.