CVE-2021-39253 : Security Advisory and Response

This CVE record pertains to a vulnerability in NTFS-3G that can be exploited by a crafted NTFS image causing an out-of-bounds read.

Understanding CVE-2021-39253

This section will delve into the specifics of the CVE-2021-39253 vulnerability.

What is CVE-2021-39253?

The CVE-2021-39253 vulnerability allows for an out-of-bounds read to occur in the ntfs_runlists_merge_i function of NTFS-3G versions earlier than 2021.8.22.

The Impact of CVE-2021-39253

The exploitation of this vulnerability can lead to unauthorized disclosure of information, denial of service, or potentially arbitrary code execution on the targeted system.

Technical Details of CVE-2021-39253

In this section, we will cover the technical aspects of the CVE-2021-39253 vulnerability.

Vulnerability Description

The vulnerability arises due to improper handling of crafted NTFS images within the ntfs_runlists_merge_i function.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions Affected: NTFS-3G versions prior to 2021.8.22

Exploitation Mechanism

The vulnerability can be exploited by a malicious actor crafting a specifically designed NTFS image to trigger the out-of-bounds read.

Mitigation and Prevention

This section will provide guidance on mitigating the risks associated with CVE-2021-39253.

Immediate Steps to Take

Update NTFS-3G to version 2021.8.22 or newer to address the vulnerability.
Avoid opening NTFS images from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and systems to prevent known vulnerabilities.
Conduct security assessments and audits to identify and remediate potential weaknesses proactively.

Patching and Updates

Ensure timely patching of systems and applications to stay protected against emerging security threats.