CVE-2020-21819 : Exploit Details and Defense Strategies

A heap-based buffer overflow vulnerability exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:51.

Understanding CVE-2020-21819

This CVE involves a specific vulnerability in GNU LibreDWG that could lead to a heap-based buffer overflow.

What is CVE-2020-21819?

The vulnerability in GNU LibreDWG 0.10.2641 allows attackers to trigger a heap-based buffer overflow by exploiting the htmlescape function in the escape.c file.

The Impact of CVE-2020-21819

This vulnerability could potentially allow remote attackers to execute arbitrary code or cause a denial of service (DoS) condition on the affected system.

Technical Details of CVE-2020-21819

Vulnerability Description

A heap-based buffer overflow vulnerability in GNU LibreDWG 0.10.2641via htmlescape ../../programs/escape.c:51.

Affected Systems and Versions

Affected Version: GNU LibreDWG 0.10.2641

Exploitation Mechanism

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

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patches provided by the vendor to mitigate the vulnerability.
Consider implementing proper input validation mechanisms to prevent buffer overflow attacks.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security assessments and code reviews to identify and remediate potential security issues.

Patching and Updates

Keep the GNU LibreDWG software up to date with the latest patches and versions to prevent exploitation of this vulnerability.