CVE-2021-42586 Explained : Impact and Mitigation

A heap buffer overflow vulnerability was found in copy_bytes in decode_r2007.c in dwgread before version 0.12.4 when processing a maliciously crafted dwg file.

Understanding CVE-2021-42586

This CVE details a heap buffer overflow vulnerability in dwgread.

What is CVE-2021-42586?

The vulnerability stems from a heap buffer overflow in copy_bytes in decode_r2007.c in dwgread, allowing attackers to exploit it using a specifically crafted dwg file.

The Impact of CVE-2021-42586

Attackers can execute arbitrary code or cause a denial of service by exploiting this vulnerability.

Technical Details of CVE-2021-42586

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability is a heap buffer overflow in copy_bytes in decode_r2007.c within dwgread.

Affected Systems and Versions

The affected version is dwgread before 0.12.4.

Exploitation Mechanism

Attackers can exploit this issue by using a specially crafted dwg file that triggers the buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2021-42586 and similar vulnerabilities.

Immediate Steps to Take

Update dwgread to version 0.12.4 or later to address the vulnerability.
Employ network security measures to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update software and firmware to the latest secure versions.

Patching and Updates

Stay informed about security updates and patches for dwgread to prevent exploitation.