CVE-2020-25291 Explained : Impact and Mitigation

Kingsoft WPS Office before 11.2.0.9403 is vulnerable to remote heap corruption via a crafted PLTE chunk in PNG data within a Word document.

Understanding CVE-2020-25291

This CVE involves a specific vulnerability in Kingsoft WPS Office that allows remote heap corruption.

What is CVE-2020-25291?

GdiDrawHoriLineIAlt in Kingsoft WPS Office before version 11.2.0.9403 is susceptible to remote heap corruption through a maliciously crafted PLTE chunk in PNG data within a Word document. The issue is associated with QBrush::setMatrix in gui/painting/qbrush.cpp in Qt 4.x.

The Impact of CVE-2020-25291

The vulnerability can be exploited remotely to corrupt the heap, potentially leading to unauthorized access or denial of service.

Technical Details of CVE-2020-25291

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

Vulnerability Description

The vulnerability in Kingsoft WPS Office allows remote heap corruption via a specially crafted PLTE chunk in PNG data within a Word document.

Affected Systems and Versions

Affected Product: Kingsoft WPS Office
Vulnerable Version: Before 11.2.0.9403

Exploitation Mechanism

The vulnerability can be exploited remotely by utilizing a crafted PLTE chunk in PNG data within a Word document.

Mitigation and Prevention

Protecting systems from CVE-2020-25291 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Kingsoft WPS Office to version 11.2.0.9403 or later to mitigate the vulnerability.
Be cautious when opening Word documents from untrusted sources.

Long-Term Security Practices

Regularly update software and applications to patch known vulnerabilities.
Implement network security measures to prevent remote exploitation.

Patching and Updates

Ensure that all software, including Kingsoft WPS Office, is regularly updated to the latest versions to address security flaws.