CVE-2021-39261 Explained : Impact and Mitigation

This CVE record involves a heap-based buffer overflow in NTFS-3G due to a crafted NTFS image.

Understanding CVE-2021-39261

This vulnerability can be exploited by a crafted NTFS image to trigger the overflow in ntfs_compressed_pwrite in NTFS-3G versions earlier than 2021.8.22.

What is CVE-2021-39261?

The vulnerability results from a crafted NTFS image causing a heap-based buffer overflow in NTFS-3G.

The Impact of CVE-2021-39261

An attacker could exploit this flaw to execute arbitrary code or crash the system.

Technical Details of CVE-2021-39261

NTFS-3G heap-based buffer overflow vulnerability

Vulnerability Description

Vulnerability in ntfs_compressed_pwrite in NTFS-3G before version 2021.8.22.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions before NTFS-3G 2021.8.22 are affected.

Exploitation Mechanism

By utilizing a crafted NTFS image, an attacker can trigger the heap-based buffer overflow in the specified function.

Mitigation and Prevention

Preventive measures to address CVE-2021-39261

Immediate Steps to Take

Update NTFS-3G to version 2021.8.22 or later to mitigate the vulnerability.
Avoid opening or mounting untrusted or unknown NTFS images.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security assessments and audits to identify and remediate vulnerabilities.

Patching and Updates

Patch and update NTFS-3G to the latest version to address the heap-based buffer overflow vulnerability.