CVE-2018-19797 : Vulnerability Insights and Analysis

LibSass version 3.5.5 encounters a vulnerability in the function Sass::Selector_List::populate_extends in SharedPtr.hpp, leading to a NULL Pointer Dereference and potential Denial of Service (DoS) through a crafted input file.

Understanding CVE-2018-19797

In LibSass 3.5.5, a vulnerability exists in the function Sass::Selector_List::populate_extends in SharedPtr.hpp, which may result in a Denial of Service (DoS) attack by crashing the application with a malicious input file.

What is CVE-2018-19797?

This CVE refers to a NULL Pointer Dereference vulnerability in LibSass version 3.5.5, allowing an attacker to cause a DoS condition by providing a specially crafted sass input file.

The Impact of CVE-2018-19797

The vulnerability can be exploited by malicious actors to crash the application, leading to a denial of service condition.

Technical Details of CVE-2018-19797

Vulnerability Description

The vulnerability in LibSass version 3.5.5 arises from a NULL Pointer Dereference in the function Sass::Selector_List::populate_extends in SharedPtr.hpp, potentially resulting in a DoS attack.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: 3.5.5

Exploitation Mechanism

The vulnerability can be exploited by providing a malicious sass input file, triggering the NULL Pointer Dereference and causing a DoS (application crash).

Mitigation and Prevention

Immediate Steps to Take

Update LibSass to a patched version that addresses the vulnerability.
Avoid processing untrusted sass input files.

Long-Term Security Practices

Regularly monitor for security advisories and updates related to LibSass.
Implement input validation mechanisms to prevent malicious input files.

Patching and Updates

Apply patches provided by the vendor to mitigate the vulnerability and ensure the security of the system.