CVE-2021-42780 : What You Need to Know

A use after return issue was found in Opensc before version 0.22.0 that could potentially crash programs using the library.

Understanding CVE-2021-42780

A vulnerability in the insert_pin function of Opensc version 0.22.0 and earlier could lead to program crashes.

What is CVE-2021-42780?

Opensc, before version 0.22.0, has a use after return issue in the insert_pin function, posing a risk of program crashes.

The Impact of CVE-2021-42780

This vulnerability may allow attackers to cause denial of service by crashing programs utilizing Opensc before version 0.22.0.

Technical Details of CVE-2021-42780

The vulnerability details, affected systems, and exploitation mechanism are outlined below.

Vulnerability Description

A use after return issue in the insert_pin function of Opensc before version 0.22.0 may lead to crashes in programs utilizing the library.

Affected Systems and Versions

Vendor: n/a
Product: Opensc
Vulnerable Version: Opensc 0.22.0

Exploitation Mechanism

Attackers could exploit this vulnerability to crash programs using Opensc before version 0.22.0.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2021-42780 vulnerability are crucial for system security.

Immediate Steps to Take

Update Opensc to version 0.22.0 to mitigate the vulnerability
Monitor security advisories from related vendors

Long-Term Security Practices

Regularly patch and update software libraries and dependencies
Conduct routine security audits to identify and address vulnerabilities

Patching and Updates

Apply patches promptly to address known vulnerabilities in Opensc