CVE-2020-21836 Explained : Impact and Mitigation

A heap-based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via read_2004_section_preview ../../src/decode.c:3175.

Understanding CVE-2020-21836

This CVE-2020-21836 vulnerability pertains to a heap-based buffer overflow in GNU LibreDWG 0.10.

What is CVE-2020-21836?

The vulnerability in GNU LibreDWG 0.10 allows attackers to trigger a heap-based buffer overflow via a specific function call in the decode.c file.

The Impact of CVE-2020-21836

This vulnerability could potentially lead to arbitrary code execution or denial of service if exploited by malicious actors.

Technical Details of CVE-2020-21836

The technical aspects of the CVE-2020-21836 vulnerability are as follows:

Vulnerability Description

A heap-based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via read_2004_section_preview in the decode.c file at line 3175.

Affected Systems and Versions

Product: GNU LibreDWG 0.10
Vendor: N/A
Version: N/A

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious input that triggers the buffer overflow when processed by the vulnerable function.

Mitigation and Prevention

To address CVE-2020-21836, follow these mitigation steps:

Immediate Steps to Take

Apply the latest security patches provided by the vendor.
Implement input validation mechanisms to prevent buffer overflows.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Conduct security audits and code reviews to identify and fix vulnerabilities.

Patching and Updates

Stay informed about security advisories related to GNU LibreDWG.
Monitor for any patches or updates released by the vendor to address this vulnerability.