CVE-2019-18798 : Security Advisory and Response

LibSass before version 3.6.3 has a vulnerability that leads to a heap-based buffer over-read in the ast_sel_weave.cpp file's Sass::weaveParents function.

Understanding CVE-2019-18798

This CVE involves a specific vulnerability in LibSass that can have security implications.

What is CVE-2019-18798?

LibSass prior to version 3.6.3 is susceptible to a heap-based buffer over-read in the ast_sel_weave.cpp file's Sass::weaveParents function.

The Impact of CVE-2019-18798

This vulnerability could potentially be exploited by attackers to read sensitive information from the heap, leading to a security breach.

Technical Details of CVE-2019-18798

Details about the vulnerability and its implications.

Vulnerability Description

The vulnerability in LibSass before version 3.6.3 allows a heap-based buffer over-read in the Sass::weaveParents function in ast_sel_weave.cpp.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by manipulating the Sass::weaveParents function in the ast_sel_weave.cpp file to trigger a heap-based buffer over-read.

Mitigation and Prevention

Ways to address and prevent the CVE-2019-18798 vulnerability.

Immediate Steps to Take

Update LibSass to version 3.6.3 or newer to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to the latest versions to address known vulnerabilities.
Implement secure coding practices to prevent buffer over-read vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by LibSass to address vulnerabilities like CVE-2019-18798.