CVE-2017-11608 : Security Advisory and Response

A remote denial of service attack can be triggered due to a heap-based buffer over-read vulnerability found in lexer.cpp within LibSass version 3.4.5. This vulnerability occurs specifically in the Sass::Prelexer::re_linebreak function when processing specially crafted input.

Understanding CVE-2017-11608

This CVE involves a heap-based buffer over-read vulnerability in LibSass version 3.4.5, leading to a remote denial of service attack.

What is CVE-2017-11608?

The vulnerability is located in the Sass::Prelexer::re_linebreak function in lexer.cpp within LibSass version 3.4.5. An attacker can exploit this issue by providing specially crafted input.

The Impact of CVE-2017-11608

The vulnerability can be exploited to trigger a remote denial of service attack on systems running the affected version of LibSass.

Technical Details of CVE-2017-11608

This section provides more technical insights into the vulnerability.

Vulnerability Description

A heap-based buffer over-read vulnerability exists in the Sass::Prelexer::re_linebreak function in lexer.cpp within LibSass version 3.4.5.

Affected Systems and Versions

Product: LibSass
Vendor: N/A
Version: 3.4.5

Exploitation Mechanism

The vulnerability can be exploited by providing specially crafted input to the Sass::Prelexer::re_linebreak function.

Mitigation and Prevention

Protecting systems from CVE-2017-11608 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update LibSass to a non-vulnerable version if available.
Implement input validation mechanisms to prevent malicious input.

Long-Term Security Practices

Regularly monitor and update software components to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate potential weaknesses.

Patching and Updates

Apply patches provided by the software vendor to fix the vulnerability in LibSass version 3.4.5.