CVE-2021-33480 : What You Need to Know

An use-after-free vulnerability was discovered in gocr through version 0.53-20200802 in context_correction() in pgm2asc.c.

Understanding CVE-2021-33480

This CVE identifies a use-after-free vulnerability in the 'gocr' application up to version 0.53-20200802.

What is CVE-2021-33480?

CVE-2021-33480 is a vulnerability found in the 'gocr' application through version 0.53-20200802, specifically in the context_correction() function in pgm2asc.c.

The Impact of CVE-2021-33480

The use-after-free vulnerability in 'gocr' could potentially allow an attacker to execute arbitrary code or cause a denial of service by leveraging this flaw.

Technical Details of CVE-2021-33480

This section provides detailed technical insights into CVE-2021-33480.

Vulnerability Description

The vulnerability arises due to improper handling of memory in the context_correction() function of pgm2asc.c in 'gocr' versions up to 0.53-20200802.

Affected Systems and Versions

The affected product is 'gocr' version 0.53-20200802.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious input that triggers the use-after-free condition, potentially leading to code execution or denial of service.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-33480, immediate actions need to be taken along with implementing long-term security practices.

Immediate Steps to Take

Users are advised to update to a patched version of 'gocr' to prevent exploitation of this vulnerability. Additionally, consider implementing other security measures to protect the system.

Long-Term Security Practices

Incorporate secure coding practices, conduct regular security audits, and stay informed about software vulnerabilities to enhance overall security posture.

Patching and Updates

Stay vigilant for security updates from the 'gocr' project maintainers and promptly apply patches to eliminate the vulnerability.