CVE-2019-6286 Explained : Impact and Mitigation

LibSass version 3.5.5 contains a vulnerability in the function Sass::Prelexer::skip_over_scopes resulting in a heap-based buffer over-read. This issue is similar to CVE-2018-11693.

Understanding CVE-2019-6286

LibSass version 3.5.5 vulnerability with a heap-based buffer over-read.

What is CVE-2019-6286?

LibSass version 3.5.5 has a vulnerability in the function Sass::Prelexer::skip_over_scopes, leading to a heap-based buffer over-read when called from Sass::Parser::parse_import().

The Impact of CVE-2019-6286

The vulnerability allows attackers to potentially execute arbitrary code or cause a denial of service by triggering a heap-based buffer over-read.

Technical Details of CVE-2019-6286

Details of the technical aspects of the vulnerability.

Vulnerability Description

Vulnerability in LibSass version 3.5.5 in the function Sass::Prelexer::skip_over_scopes in prelexer.hpp.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

The vulnerability is exploited by calling the vulnerable function Sass::Prelexer::skip_over_scopes from Sass::Parser::parse_import().

Mitigation and Prevention

Ways to mitigate and prevent the CVE-2019-6286 vulnerability.

Immediate Steps to Take

Update LibSass to a patched version that addresses the heap-based buffer over-read vulnerability.
Monitor for any unusual activities on the system that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to the latest secure versions.
Conduct security audits and code reviews to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches provided by the software vendor to fix the vulnerability and enhance system security.