CVE-2021-39256 Explained : Impact and Mitigation

This CVE record pertains to a heap-based buffer overflow vulnerability in NTFS-3G.

Understanding CVE-2021-39256

This section provides insights into the nature and impact of the vulnerability.

What is CVE-2021-39256?

CVE-2021-39256 involves a crafted NTFS image that can trigger a heap-based buffer overflow in ntfs_inode_lookup_by_name within NTFS-3G versions prior to 2021.8.22.

The Impact of CVE-2021-39256

The vulnerability can potentially be exploited to execute arbitrary code or disrupt system operations, posing a significant security risk to affected systems.

Technical Details of CVE-2021-39256

Explore the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from improper handling of crafted NTFS images, leading to a heap-based buffer overflow in ntfs_inode_lookup_by_name.

Affected Systems and Versions

Vendor: Not applicable
Product: Not applicable
Affected Versions: All versions of NTFS-3G prior to 2021.8.22

Exploitation Mechanism

The vulnerability can be exploited by an attacker crafting a malicious NTFS image to trigger the buffer overflow, potentially resulting in arbitrary code execution.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-39256.

Immediate Steps to Take

Update NTFS-3G to version 2021.8.22 or newer to eliminate the vulnerability.
Avoid opening untrusted or suspicious NTFS images.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network segmentation and access controls to limit potential attack surfaces.
Conduct regular security audits and vulnerability assessments.

Patching and Updates

Ensure timely application of security patches and updates to all systems and software to address known vulnerabilities.