CVE-2018-3989 : Exploit Details and Defense Strategies

This CVE-2018-3989 article provides insights into a vulnerability in the WIBU-SYSTEMS WibuKey.sys driver, detailing its impact, technical aspects, and mitigation strategies.

Understanding CVE-2018-3989

CVE-2018-3989 pertains to a kernel memory disclosure vulnerability in the WIBU-SYSTEMS WibuKey.sys driver.

What is CVE-2018-3989?

The vulnerability lies in the 0x8200E804 IOCTL handler of WibuKey.sys Version 6.40, allowing an attacker to expose kernel memory by leveraging uninitialized memory returned by the driver in response to a specially crafted IRP request.

The Impact of CVE-2018-3989

The vulnerability has a CVSS base score of 4.3, indicating a medium severity issue with low confidentiality impact and no integrity or availability impact. The attack complexity is low, requiring local access without the need for privileges.

Technical Details of CVE-2018-3989

This section delves into the technical aspects of the CVE-2018-3989 vulnerability.

Vulnerability Description

The vulnerability in the WibuKey.sys driver allows an attacker to disclose kernel memory by exploiting uninitialized memory returned in response to a specially crafted IRP request.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Version: 6.40 (Build 2400)

Exploitation Mechanism

To trigger the vulnerability, an attacker can send a specially crafted IRP request to the driver, causing it to return uninitialized memory and leading to kernel memory disclosure.

Mitigation and Prevention

Protecting systems from CVE-2018-3989 requires immediate actions and long-term security practices.

Immediate Steps to Take

Monitor security advisories from the vendor for patches or workarounds.
Implement strict access controls to limit exposure to local attackers.

Long-Term Security Practices

Regularly update and patch all system components to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate potential weaknesses.

Patching and Updates

Apply patches provided by the vendor promptly to mitigate the vulnerability and enhance system security.