CVE-2020-13756 Explained : Impact and Mitigation
Learn about CVE-2020-13756, a vulnerability in Sabberworm PHP CSS Parser before 8.3.1 allowing remote code execution. Find mitigation steps and update recommendations here.
Sabberworm PHP CSS Parser before 8.3.1 allows remote code execution due to uncontrolled data evaluation.
Understanding CVE-2020-13756
Sabberworm PHP CSS Parser vulnerability leading to potential remote code execution.
What is CVE-2020-13756?
The vulnerability in Sabberworm PHP CSS Parser before version 8.3.1 allows attackers to execute remote code by manipulating uncontrolled data within specific functions.
The Impact of CVE-2020-13756
The vulnerability could result in remote code execution if the functions allSelectors() or getSelectorsBySpecificity() are called with attacker-controlled input.
Technical Details of CVE-2020-13756
Details of the vulnerability in Sabberworm PHP CSS Parser.
Vulnerability Description
The issue arises from the parser calling eval on uncontrolled data, potentially enabling remote code execution.
Affected Systems and Versions
- Product: Sabberworm PHP CSS Parser
- Vendor: Sabberworm
- Versions affected: All versions before 8.3.1
Exploitation Mechanism
- Attackers can exploit the vulnerability by providing malicious input to the allSelectors() or getSelectorsBySpecificity() functions.
Mitigation and Prevention
Protective measures to address CVE-2020-13756.
Immediate Steps to Take
- Update Sabberworm PHP CSS Parser to version 8.3.1 or later.
- Avoid using user-controlled data in functions that trigger eval.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Implement input validation and sanitization to prevent code injection attacks.
Patching and Updates
- Apply patches and updates provided by Sabberworm promptly to mitigate the vulnerability.