CVE-2019-5086 Explained : Impact and Mitigation

An integer overflow vulnerability in xcftools version 1.0.7 could allow an attacker to execute arbitrary code by manipulating memory through a specially crafted XCF file.

Understanding CVE-2019-5086

This CVE involves an integer overflow vulnerability in the flattenIncrementally function of xcftools version 1.0.7.

What is CVE-2019-5086?

The vulnerability in the xcf2png and xcf2pnm binaries of xcftools version 1.0.7 could lead to memory corruption and arbitrary code execution when processing a malicious XCF file.

The Impact of CVE-2019-5086

The vulnerability has a CVSS base score of 7.5 (High severity) with a high impact on confidentiality, integrity, and availability. It requires user interaction to be triggered.

Technical Details of CVE-2019-5086

This section provides more technical insights into the vulnerability.

Vulnerability Description

The flattenIncrementally function in xcftools version 1.0.7 is susceptible to an integer overflow, potentially leading to memory corruption and arbitrary code execution.

Affected Systems and Versions

Product: xcftools
Version: xcftools 1.0.7

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious XCF file that triggers an integer overflow during tile traversal, allowing an attacker to execute arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2019-5086 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update xcftools to a patched version to mitigate the vulnerability.
Avoid opening XCF files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement file validation mechanisms to detect and block malicious XCF files.

Patching and Updates

Ensure that all systems running xcftools are updated with the latest security patches to address the vulnerability.