CVE-2019-5094 : Exploit Details and Defense Strategies

E2fsprogs 1.45.3 contains a vulnerability in the quota file feature that can lead to potential code execution through an out-of-bounds write on the heap. This CVE allows attackers to trigger code execution by corrupting a partition.

Understanding CVE-2019-5094

This CVE pertains to a code execution vulnerability in E2fsprogs 1.45.3.

What is CVE-2019-5094?

An exploitable vulnerability in the quota file functionality of E2fsprogs 1.45.3 allows for code execution through a specially crafted ext4 partition, resulting in an out-of-bounds write on the heap.

The Impact of CVE-2019-5094

CVSS Base Score: 7.5 (High)
Attack Vector: Local
Attack Complexity: High
Privileges Required: High
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Scope: Changed
User Interaction: None

Technical Details of CVE-2019-5094

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in E2fsprogs 1.45.3 allows for an out-of-bounds write on the heap, enabling code execution when a carefully designed ext4 partition is used.

Affected Systems and Versions

Affected Product: E2fsprogs
Affected Versions: E2fsprogs 1.43.3 - 1.45.3

Exploitation Mechanism

The vulnerability can be triggered by an attacker who intentionally corrupts a partition to exploit the out-of-bounds write.

Mitigation and Prevention

To address CVE-2019-5094, follow these mitigation strategies:

Immediate Steps to Take

Update E2fsprogs to a non-vulnerable version.
Monitor for any unusual partition activity.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement proper access controls and monitoring mechanisms.

Patching and Updates

Apply the latest security updates provided by E2fsprogs to fix the vulnerability.