CVE-2021-3477 : Vulnerability Insights and Analysis

OpenEXR's deep tile sample size calculations in versions before 3.0.0-beta have a flaw that can lead to an out-of-bounds read due to an integer overflow. This CVE poses a risk to application availability.

Understanding CVE-2021-3477

This CVE highlights a vulnerability in OpenEXR that could be exploited by an attacker to cause an out-of-bounds read through a crafted file.

What is CVE-2021-3477?

The flaw in OpenEXR versions before 3.0.0-beta allows an attacker to trigger an integer overflow, leading to an out-of-bounds read, potentially impacting the availability of the application.

The Impact of CVE-2021-3477

The greatest risk posed by this vulnerability is to the availability of the application processing the crafted file.

Technical Details of CVE-2021-3477

This section covers specific technical details of the vulnerability.

Vulnerability Description

The flaw in OpenEXR's deep tile sample size calculations before version 3.0.0-beta can result in an out-of-bounds read due to an integer overflow.

Affected Systems and Versions

Vendor: n/a
Product: OpenEXR
Affected Version: OpenEXR 3.0.0-beta

Exploitation Mechanism

An attacker needs to submit a specially crafted file to be processed by OpenEXR to trigger the integer overflow, causing an out-of-bounds read.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-3477, immediate steps should be taken alongside long-term security practices.

Immediate Steps to Take

Update OpenEXR to version 3.0.0-beta or later to address the vulnerability.
Monitor for any unusual file processing activities.

Long-Term Security Practices

Implement secure coding practices to prevent integer overflow vulnerabilities.
Conduct regular security assessments and audits of the software.

Patching and Updates

Stay informed about security updates for OpenEXR and promptly apply patches to ensure the mitigation of known vulnerabilities.