CVE-2021-45943 : Security Advisory and Response

GDAL 3.3.0 through 3.4.0 has a heap-based buffer overflow vulnerability that can be exploited through specific functions within the PCIDSK module.

Understanding CVE-2021-45943

What is CVE-2021-45943?

GDAL (Geospatial Data Abstraction Library) versions 3.3.0 through 3.4.0 are vulnerable to a heap-based buffer overflow in certain PCIDSK functions, allowing attackers to execute arbitrary code or crash the application.

The Impact of CVE-2021-45943

This vulnerability could lead to remote code execution, denial of service, or potential data exposure if successfully exploited.

Technical Details of CVE-2021-45943

Vulnerability Description

The issue arises from a heap-based buffer overflow in PCIDSK::CPCIDSKFile::ReadFromFile, which can be triggered through PCIDSK::CPCIDSKSegment::ReadFromFile and PCIDSK::CPCIDSKBinarySegment::CPCIDSKBinarySegment functions.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: 3.3.0 through 3.4.0

Exploitation Mechanism

Hackers can exploit this vulnerability by crafting a malicious PCIDSK file and enticing a user or system to open it using the affected GDAL versions.

Mitigation and Prevention

Immediate Steps to Take

Update GDAL to version 3.4.1 or later to address this vulnerability.
Avoid opening untrusted PCIDSK files from unknown or unverified sources.

Long-Term Security Practices

Regularly update software and libraries to their latest patched versions.
Conduct security training for users on recognizing phishing attempts and malicious files.

Patching and Updates

Ensure continuous monitoring for security advisories and promptly apply patches released by GDAL to mitigate any potential risks.