CVE-2021-39258 : Security Advisory and Response
Understand the CVE-2021-39258 vulnerability in NTFS-3G that allows crafted NTFS images to trigger out-of-bounds reads. Learn about impacts, affected systems, exploitation, and mitigation steps.
CVE-2021-39258 is a vulnerability that can cause out-of-bounds reads in ntfs_attr_find and ntfs_external_attr_find in NTFS-3G < 2021.8.22.
Understanding CVE-2021-39258
This section provides insights into the nature of the CVE-2021-39258 vulnerability.
What is CVE-2021-39258?
CVE-2021-39258 allows a crafted NTFS image to lead to out-of-bounds reads in specific NTFS-3G functions.
The Impact of CVE-2021-39258
The vulnerability can potentially result in unauthorized information disclosure or denial of service attacks.
Technical Details of CVE-2021-39258
This section delves into the technical aspects of the CVE-2021-39258 vulnerability.
Vulnerability Description
The flaw creates opportunities for out-of-bounds reads in ntfs_attr_find and ntfs_external_attr_find.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Versions: NTFS-3G < 2021.8.22 are affected.
Exploitation Mechanism
The vulnerability can be exploited by manipulating a crafted NTFS image to trigger out-of-bounds reads.
Mitigation and Prevention
This section suggests mitigations and preventive measures for CVE-2021-39258.
Immediate Steps to Take
- Update to NTFS-3G version 2021.8.22 or newer.
- Avoid opening NTFS images from untrusted or unknown sources.
Long-Term Security Practices
- Regularly update and patch NTFS-related software.
- Implement network intrusion detection systems to monitor unusual activities.
Patching and Updates
- Stay informed about security advisories from relevant vendors.
- Apply patches promptly to fix known vulnerabilities.