CVE-2021-3467 : Vulnerability Insights and Analysis

A NULL pointer dereference flaw was found in the way Jasper versions before 2.0.26 handled component references in CDEF box in the JP2 image format decoder, potentially leading to a crash when opening specially crafted JP2 image files.

Understanding CVE-2021-3467

This section will delve into the details of the CVE-2021-3467 vulnerability.

What is CVE-2021-3467?

CVE-2021-3467 is a NULL pointer dereference flaw present in Jasper versions prior to 2.0.26. It arises due to improper handling of component references in the CDEF box within the JP2 image format decoder.

The Impact of CVE-2021-3467

Exploitation of this vulnerability could result in a denial of service scenario where an attacker could craft a malicious JP2 image file to crash applications utilizing the vulnerable Jasper library upon opening.

Technical Details of CVE-2021-3467

In this section, we will explore the technical aspects of CVE-2021-3467.

Vulnerability Description

The vulnerability involves a NULL pointer dereference in the JP2 image format decoder of Jasper versions older than 2.0.26, triggered by improper handling of component references within the CDEF box.

Affected Systems and Versions

Jasper version 2.0.26 and below are impacted by this CVE. Systems using older versions of Jasper are susceptible to exploitation.

Exploitation Mechanism

An attacker can exploit this vulnerability by creating a specially crafted JP2 image file, which upon opening by an application utilizing the vulnerable Jasper library, can lead to a crash.

Mitigation and Prevention

This section will focus on the steps to mitigate and prevent the exploitation of CVE-2021-3467.

Immediate Steps to Take

Users and administrators are advised to update Jasper to version 2.0.26 or newer to mitigate the vulnerability. It is also recommended to avoid opening JP2 image files from untrusted or unknown sources.

Long-Term Security Practices

Regularly updating software and libraries to the latest versions, along with practicing secure coding standards, can enhance overall system security and reduce the risk of similar vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Jasper to address vulnerabilities like CVE-2021-3467, and promptly apply them to ensure the security of your systems.