CVE-2021-42585 : What You Need to Know

A heap buffer overflow vulnerability was found in copy_compressed_bytes in decode_r2007.c in dwgread prior to version 0.12.4 through a maliciously crafted dwg file.

Understanding CVE-2021-42585

This CVE describes a heap buffer overflow vulnerability that could be exploited via a specially crafted DWG file.

What is CVE-2021-42585?

A heap buffer overflow vulnerability in copy_compressed_bytes in decode_r2007.c in dwgread before version 0.12.4 through a crafted dwg file.

The Impact of CVE-2021-42585

The vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by crashing the application.

Technical Details of CVE-2021-42585

This section provides technical details about the vulnerability.

Vulnerability Description

A heap buffer overflow was discovered in copy_compressed_bytes in decode_r2007.c in dwgread before 0.12.4 through a maliciously crafted dwg file.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by an attacker by creating a specially crafted DWG file to trigger the heap buffer overflow.

Mitigation and Prevention

It is crucial to take immediate and long-term security measures to prevent exploitation of this vulnerability.

Immediate Steps to Take

Update dwgread to version 0.12.4 or later to mitigate the vulnerability.
Avoid opening DWG files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and applications to the latest versions.
Employ security tools and practices to detect and prevent buffer overflow attacks.

Patching and Updates

Ensure that all systems running dwgread are updated to version 0.12.4 or above to patch the vulnerability.