CVE-2020-7071 Explained : Impact and Mitigation
Learn about CVE-2020-7071 affecting PHP versions 7.3.x, 7.4.x, and 8.0.0. Understand the impact, technical details, and mitigation steps for this URL validation vulnerability.
PHP versions 7.3.x below 7.3.26, 7.4.x below 7.4.14, and 8.0.0 allow URLs with invalid userinfo, potentially leading to mis-parsing and incorrect data.
Understanding CVE-2020-7071
In PHP versions 7.3.x below 7.3.26, 7.4.x below 7.4.14, and 8.0.0, a vulnerability exists in URL validation functions.
What is CVE-2020-7071?
PHP versions 7.3.x below 7.3.26, 7.4.x below 7.4.14, and 8.0.0 accept URLs with invalid passwords as valid, which can cause misinterpretation of URL components.
The Impact of CVE-2020-7071
- CVSS Base Score: 5.3 (Medium)
- Attack Vector: Network
- Confidentiality Impact: Low
- Integrity Impact: None
- This vulnerability may lead to incorrect data processing by functions relying on valid URLs.
Technical Details of CVE-2020-7071
PHP vulnerability allowing acceptance of URLs with invalid userinfo.
Vulnerability Description
- PHP versions 7.3.x below 7.3.26, 7.4.x below 7.4.14, and 8.0.0 accept URLs with invalid passwords as valid.
Affected Systems and Versions
- Affected Versions: PHP 7.3.x, 7.4.x, and 8.0.0
- Versions below 7.3.26, 7.4.14, and 8.0.1 are vulnerable.
Exploitation Mechanism
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Exploitation involves providing URLs with invalid passwords.
Mitigation and Prevention
Steps to address and prevent the CVE-2020-7071 vulnerability.
Immediate Steps to Take
- Update PHP to versions 7.3.26, 7.4.14, or 8.0.1 to mitigate the vulnerability.
- Review and validate URLs to ensure they conform to expected formats.
Long-Term Security Practices
- Regularly monitor PHP security advisories for updates and patches.
- Implement input validation mechanisms to prevent similar vulnerabilities.
Patching and Updates
- Apply patches provided by PHP Group to fix the URL validation issue.