CVE-2019-6283 : Security Advisory and Response

LibSass version 3.5.5 is affected by a heap-based buffer over-read vulnerability in the prelexer.hpp file. This vulnerability exists in the Sass::Prelexer::parentheses_scope function.

Understanding CVE-2019-6283

This CVE entry describes a specific vulnerability in LibSass version 3.5.5.

What is CVE-2019-6283?

The vulnerability is a heap-based buffer over-read in the LibSass library, specifically in the Sass::Prelexer::parentheses_scope function within the prelexer.hpp file.

The Impact of CVE-2019-6283

This vulnerability could potentially be exploited by an attacker to read sensitive information from the memory of the affected system, leading to a compromise of data integrity and confidentiality.

Technical Details of CVE-2019-6283

This section provides more technical insights into the vulnerability.

Vulnerability Description

The heap-based buffer over-read vulnerability in LibSass 3.5.5 occurs in the Sass::Prelexer::parentheses_scope function within the prelexer.hpp file.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: 3.5.5 (affected)

Exploitation Mechanism

The vulnerability can be exploited by an attacker to trigger the buffer over-read, potentially leading to unauthorized access to sensitive information.

Mitigation and Prevention

Protecting systems from CVE-2019-6283 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update LibSass to a non-vulnerable version if available.
Monitor vendor advisories for patches and updates.
Implement network security measures to detect and block exploit attempts.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.
Educate users and developers on secure coding practices to prevent similar vulnerabilities.
Implement access controls and least privilege principles to limit the impact of potential breaches.

Patching and Updates

Stay informed about security updates and patches released by the LibSass project or relevant vendors to address the vulnerability effectively.