CVE-2021-39525 : What You Need to Know

An issue was discovered in libredwg through v0.10.1.3751. This CVE involves a heap-based buffer overflow in bit_read_fixed() function in bits.c.

Understanding CVE-2021-39525

This CVE identifies a specific vulnerability in the libredwg library.

What is CVE-2021-39525?

CVE-2021-39525 is a vulnerability found in libredwg through version v0.10.1.3751, where the function bit_read_fixed() in bits.c is prone to a heap-based buffer overflow.

The Impact of CVE-2021-39525

The vulnerability could potentially allow an attacker to execute arbitrary code or trigger a denial of service by exploiting the buffer overflow in the affected function.

Technical Details of CVE-2021-39525

Details and technical aspects of the vulnerability.

Vulnerability Description

The issue arises due to a heap-based buffer overflow in bit_read_fixed() within the bits.c file of libredwg.

Affected Systems and Versions

Affected Systems: Not applicable
Affected Versions: All versions up to v0.10.1.3751

Exploitation Mechanism

Attackers can craft a malicious input triggering an overflow in bit_read_fixed()
This can lead to the execution of arbitrary code or a denial of service situation

Mitigation and Prevention

Protective measures and actions to mitigate the CVE.

Immediate Steps to Take

Consider updating to the latest version of libredwg once a patch is released.
Apply security best practices to limit exposure to potential exploits.

Long-Term Security Practices

Implement secure coding practices to avoid buffer overflows and other memory-related vulnerabilities.
Regularly monitor for security advisories and updates related to libredwg.

Patching and Updates

Stay informed about patches and updates released by the libredwg project.
Apply patches promptly to address the vulnerability and enhance system security.