CVE-2017-12963 : Security Advisory and Response

A remote denial of service attack can occur due to an unauthorized address access in the Sass::Eval::operator() function in the eval.cpp file of LibSass version 3.4.5. This vulnerability is similar to CVE-2017-11555 but can still be exploited even after the vendor's fix for CVE-2017-11555.

Understanding CVE-2017-12963

This CVE involves a remote denial of service vulnerability in LibSass version 3.4.5.

What is CVE-2017-12963?

CVE-2017-12963 is a vulnerability in the Sass::Eval::operator() function in the eval.cpp file of LibSass version 3.4.5, allowing for a remote denial of service attack.

The Impact of CVE-2017-12963

The vulnerability can lead to a remote denial of service attack, potentially disrupting the availability of the affected system.

Technical Details of CVE-2017-12963

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from an illegal address access in the Sass::Eval::operator() function in the eval.cpp file of LibSass 3.4.5.

Affected Systems and Versions

Affected Version: LibSass 3.4.5
Vendor: n/a
Product: n/a

Exploitation Mechanism

The vulnerability allows for unauthorized address access, enabling a remote denial of service attack.

Mitigation and Prevention

Protecting systems from CVE-2017-12963 is crucial for maintaining security.

Immediate Steps to Take

Monitor vendor updates for patches addressing the vulnerability.
Implement network security measures to detect and block potential exploitation attempts.

Long-Term Security Practices

Regularly update software and apply patches promptly.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply the vendor's fix for CVE-2017-11555, available on GitHub after 2017-07-24, to mitigate the vulnerability in LibSass version 3.4.5.