CVE-2017-11554 : Exploit Details and Defense Strategies

LibSass version 3.4.5 contains a stack consumption vulnerability in the lex function within the parser.hpp file, leading to a remote denial of service attack.

Understanding CVE-2017-11554

This CVE involves a vulnerability in LibSass version 3.4.5 that can be exploited to cause a denial of service.

What is CVE-2017-11554?

The vulnerability lies in the lex function in parser.hpp used in sassc, allowing an attacker to trigger a denial of service by providing a specially crafted input.

The Impact of CVE-2017-11554

Exploiting this vulnerability can result in a remote denial of service attack, potentially disrupting services or applications relying on LibSass.

Technical Details of CVE-2017-11554

This section provides more technical insights into the vulnerability.

Vulnerability Description

The stack consumption vulnerability in the lex function within parser.hpp in LibSass 3.4.5 enables attackers to execute a remote denial of service attack by manipulating input data.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited by providing a specifically crafted input to the lex function in parser.hpp, which triggers the denial of service.

Mitigation and Prevention

Protecting systems from CVE-2017-11554 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update LibSass to a patched version or apply relevant security fixes.
Monitor for any unusual activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software components to mitigate known vulnerabilities.
Implement input validation mechanisms to prevent malicious inputs.

Patching and Updates

Stay informed about security advisories related to LibSass and apply patches promptly to address vulnerabilities.