CVE-2020-9385 : What You Need to Know

A NULL Pointer Dereference exists in libzint in Zint 2.7.1 due to mishandling of multiple + characters in certain functions during EAN barcode generation.

Understanding CVE-2020-9385

What is CVE-2020-9385?

The CVE-2020-9385 vulnerability involves a NULL Pointer Dereference in libzint in Zint 2.7.1, specifically in the handling of certain characters during EAN barcode generation.

The Impact of CVE-2020-9385

This vulnerability could potentially lead to a denial of service (DoS) condition or arbitrary code execution by an attacker exploiting the mishandling of characters in the affected functions.

Technical Details of CVE-2020-9385

Vulnerability Description

The issue arises from the mishandling of multiple + characters in the add_on function in upcean.c when called from eanx in upcean.c during EAN barcode generation.

Affected Systems and Versions

Systems running Zint 2.7.1 are affected by this vulnerability.

Exploitation Mechanism

An attacker could exploit this vulnerability by crafting a malicious input that triggers the mishandling of characters, leading to a NULL Pointer Dereference.

Mitigation and Prevention

Immediate Steps to Take

Consider updating to a patched version of Zint that addresses this vulnerability.
Implement input validation mechanisms to prevent malicious inputs.

Long-Term Security Practices

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

Patching and Updates

Apply patches provided by the software vendor to fix the NULL Pointer Dereference vulnerability.