CVE-2019-18799 : Exploit Details and Defense Strategies
Learn about CVE-2019-18799, a vulnerability in LibSass before 3.6.3 that allows a NULL pointer dereference in Sass::Parser::parseCompoundSelector, potentially leading to a denial of service or code execution.
LibSass before version 3.6.3 is vulnerable to a NULL pointer dereference in the function Sass::Parser::parseCompoundSelector.
Understanding CVE-2019-18799
This CVE identifies a specific vulnerability in LibSass that could lead to a NULL pointer dereference.
What is CVE-2019-18799?
The vulnerability in LibSass before version 3.6.3 can trigger a NULL pointer dereference in the function Sass::Parser::parseCompoundSelector located in the file parser_selectors.cpp.
The Impact of CVE-2019-18799
The vulnerability could potentially be exploited by an attacker to cause a denial of service (DoS) condition by crashing the application or executing arbitrary code.
Technical Details of CVE-2019-18799
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability in LibSass allows a NULL pointer dereference in the function Sass::Parser::parseCompoundSelector in parser_selectors.cpp.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability can be exploited by crafting a specific input that triggers the NULL pointer dereference in the mentioned function.
Mitigation and Prevention
To address CVE-2019-18799, follow these mitigation strategies:
Immediate Steps to Take
- Update LibSass to version 3.6.3 or later to mitigate the vulnerability.
- Monitor vendor communications for any patches or workarounds.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Implement secure coding practices to prevent similar vulnerabilities.
Patching and Updates
- Apply patches and updates provided by the LibSass project to fix the vulnerability.