CVE-2017-11556 Explained : Impact and Mitigation

LibSass 3.4.5 is affected by a vulnerability in the Parser::advanceToNextToken function, leading to excessive stack usage and a potential remote denial-of-service attack.

Understanding CVE-2017-11556

This CVE involves a stack consumption vulnerability in LibSass 3.4.5, allowing an attacker to trigger a denial-of-service condition remotely.

What is CVE-2017-11556?

The Parser::advanceToNextToken function in parser.cpp in LibSass 3.4.5 is susceptible to a flaw that enables attackers to cause a denial-of-service condition by providing specially crafted input.

The Impact of CVE-2017-11556

The vulnerability in LibSass 3.4.5 can result in a remote denial-of-service attack when exploited by malicious actors.

Technical Details of CVE-2017-11556

This section provides more technical insights into the vulnerability.

Vulnerability Description

The Parser::advanceToNextToken function in parser.cpp in LibSass 3.4.5 suffers from a stack consumption vulnerability, which can be abused to trigger a remote denial-of-service condition.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: 3.4.5

Exploitation Mechanism

Attackers can exploit this vulnerability by providing specially crafted input to the Parser::advanceToNextToken function, causing excessive stack usage and leading to a denial-of-service scenario.

Mitigation and Prevention

To address CVE-2017-11556, follow these mitigation strategies:

Immediate Steps to Take

Update LibSass to a patched version that addresses the stack consumption vulnerability.
Implement input validation mechanisms to prevent malicious inputs.

Long-Term Security Practices

Regularly monitor and update software components to mitigate potential vulnerabilities.
Conduct security assessments and audits to identify and address similar issues proactively.

Patching and Updates

Stay informed about security advisories and patches released by LibSass to apply necessary updates promptly.