CVE-2019-5188 : Security Advisory and Response

E2fsprogs e2fsck 1.45.4 has a security flaw in the directory rehashing feature that allows for the execution of arbitrary code by writing beyond stack bounds.

Understanding CVE-2019-5188

This CVE involves a code execution vulnerability in E2fsprogs e2fsck 1.45.4, enabling attackers to execute arbitrary code.

What is CVE-2019-5188?

A flaw in the directory rehashing feature of E2fsprogs e2fsck 1.45.4 allows for the execution of arbitrary code by writing beyond stack bounds.

The Impact of CVE-2019-5188

CVSS Base Score: 7.5 (High)
Attack Vector: Local
Attack Complexity: High
Privileges Required: High
Confidentiality, Integrity, and Availability Impact: High
Scope: Changed
Vulnerability Type: Out-of-bounds Write (CWE-787)

Technical Details of CVE-2019-5188

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw in E2fsprogs e2fsck 1.45.4 allows for the execution of arbitrary code by creating a specially designed ext4 directory that writes beyond stack bounds.

Affected Systems and Versions

Affected Product: E2fsprogs
Affected Versions: 1.43.3 - 1.45.4

Exploitation Mechanism

By corrupting a partition, an adversary can exploit this vulnerability to execute arbitrary code.

Mitigation and Prevention

Protect your systems from CVE-2019-5188 with these mitigation strategies.

Immediate Steps to Take

Update E2fsprogs to a patched version.
Monitor for any unusual activities on the system.
Implement strict partition access controls.

Long-Term Security Practices

Regularly update and patch all software on your systems.
Conduct security audits to identify and address vulnerabilities.

Patching and Updates

Apply security patches provided by E2fsprogs promptly.