CVE-2020-6108 : Security Advisory and Response

An exploitable code execution vulnerability exists in the fsck_chk_orphan_node functionality of F2fs-Tools F2fs.Fsck 1.13. A specially crafted f2fs filesystem can cause a heap buffer overflow resulting in a code execution. An attacker can provide a malicious file to trigger this vulnerability.

Understanding CVE-2020-6108

This CVE involves a code execution vulnerability in F2fs-Tools F2fs.Fsck 1.13.

What is CVE-2020-6108?

The vulnerability allows an attacker to execute arbitrary code by exploiting a heap buffer overflow in the fsck_chk_orphan_node function of F2fs-Tools F2fs.Fsck 1.13.

The Impact of CVE-2020-6108

The impact is rated as high with a CVSS base score of 8.2. It affects confidentiality, integrity, and availability of the system.

Technical Details of CVE-2020-6108

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises due to incorrect buffer size calculation in the fsck_chk_orphan_node function of F2fs-Tools F2fs.Fsck 1.13.

Affected Systems and Versions

Product: F2fs-Tools
Version: F2fs-Tools F2fs.Fsck 1.13

Exploitation Mechanism

The vulnerability can be exploited by providing a specially crafted f2fs filesystem to trigger a heap buffer overflow and execute malicious code.

Mitigation and Prevention

Protecting systems from CVE-2020-6108 is crucial to prevent exploitation.

Immediate Steps to Take

Apply vendor patches promptly to address the vulnerability.
Monitor for any unusual file activities that could indicate an exploit attempt.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Implement file integrity monitoring to detect unauthorized changes.

Patching and Updates

Ensure that the affected F2fs-Tools version is updated with the latest patches to eliminate the vulnerability.