CVE-2021-40418 : Security Advisory and Response

This CVE-2021-40418 article provides details about a critical vulnerability affecting Blackmagic Design DaVinci Resolve 17.3.1.0005.

Understanding CVE-2021-40418

CVE-2021-40418 describes a vulnerability in the R3D SDK when parsing a file submitted to the DPDecoder service, potentially leading to code execution.

What is CVE-2021-40418?

The vulnerability arises due to the mishandling of an object property, leading to uninitialized data being dereferenced, which can result in arbitrary code execution.

The Impact of CVE-2021-40418

CVSS Score: 9.8 (Critical)
Severity: High impact on confidentiality, integrity, and availability
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The vulnerability could allow an attacker to execute code within the application's context.

Technical Details of CVE-2021-40418

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The issue stems from the R3D SDK skipping over an assignment, leading to uninitialized member dereferencing during object destruction, potentially resulting in code execution.

Affected Systems and Versions

Affected Product: Blackmagic Design DaVinci Resolve 17.3.1.0005

Exploitation Mechanism

Exploiting the uninitialized data can lead to arbitrary pointer dereferencing in the object's virtual method table, enabling code execution.

Mitigation and Prevention

Learn about the steps to mitigate and prevent exploitation.

Immediate Steps to Take

Update to a patched version if available.
Disable processing files from untrusted sources.
Monitor network traffic for suspicious activities.

Long-Term Security Practices

Conduct regular security assessments.
Educate users on safe file handling practices.
Implement least privilege access controls.

Patching and Updates

Apply all vendor-provided patches promptly to mitigate this vulnerability.