CVE-2021-39263 : Security Advisory and Response

This CVE record discusses a heap-based buffer overflow vulnerability in NTFS-3G < 2021.8.22 that can be triggered by a crafted NTFS image.

Understanding CVE-2021-39263

This section will provide insights into the nature and impact of CVE-2021-39263.

What is CVE-2021-39263?

The vulnerability in CVE-2021-39263 is a result of an unsanitized attribute in ntfs_get_attribute_value that can lead to a heap-based buffer overflow when processing NTFS images.

The Impact of CVE-2021-39263

The exploitation of this vulnerability could allow an attacker to execute arbitrary code or crash an application, leading to a denial of service condition.

Technical Details of CVE-2021-39263

Let's delve into the technical aspects of CVE-2021-39263.

Vulnerability Description

The vulnerability is a heap-based buffer overflow triggered by a crafted NTFS image due to an unsanitized attribute in ntfs_get_attribute_value in NTFS-3G versions prior to 2021.8.22.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited by enticing a user to mount a malicious NTFS volume or open a crafted NTFS image, leading to the execution of arbitrary code or a system crash.

Mitigation and Prevention

Learn about the steps to mitigate and prevent CVE-2021-39263.

Immediate Steps to Take

Users should update NTFS-3G to version 2021.8.22 or later to mitigate the vulnerability.
Avoid opening NTFS images from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and applications to patch known vulnerabilities.
Implement strong input validation mechanisms to sanitize user inputs and prevent buffer overflow attacks.

Patching and Updates

Apply security patches and updates provided by the NTFS-3G project to ensure the system is protected from potential exploits.