CVE-2021-39523 : Security Advisory and Response

This CVE-2021-39523 article provides details about a vulnerability found in libredwg through v0.10.1.3751, leading to a Denial of Service attack.

Understanding CVE-2021-39523

An issue in libredwg through v0.10.1.3751 allows an attacker to trigger a NULL pointer dereference, resulting in a Denial of Service.

What is CVE-2021-39523?

CVE-2021-39523 is a vulnerability in libredwg through v0.10.1.3751 that permits an attacker to cause a Denial of Service by exploiting a NULL pointer dereference in the function check_POLYLINE_handles() located in decode.c.

The Impact of CVE-2021-39523

The vulnerability enables an attacker to execute a Denial of Service attack on the affected system, disrupting its normal operations.

Technical Details of CVE-2021-39523

Details of the technical aspects of the CVE-2021-39523 vulnerability.

Vulnerability Description

The issue exists in the function check_POLYLINE_handles() in decode.c, leading to a NULL pointer dereference.

Affected Systems and Versions

Product: Not Applicable
Vendor: Not Applicable
Affected Version: Not Applicable

Exploitation Mechanism

The vulnerability can be exploited by an attacker to trigger the NULL pointer dereference in the affected function.

Mitigation and Prevention

Ways to mitigate the CVE-2021-39523 vulnerability.

Immediate Steps to Take

Implement a patch or upgrade to a secure version of libredwg.
Monitor and restrict network traffic to the affected system.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security assessments and audits to identify vulnerabilities.

Patching and Updates

Apply the necessary patches released by the vendor to address the CVE-2021-39523 vulnerability.