Description
In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 some functions like fsockopen() lack validation that the hostname supplied does not contain null characters. This may lead to other functions like parse_url() treat the hostname in different way, thus opening way to security problems if the user code implements access checks before access using such functions.
Remediation
References
Related Vulnerabilities
WordPress Plugin Custom Admin Page by BestWebSoft Cross-Site Scripting (0.1.1)
Django Exposure of Resource to Wrong Sphere Vulnerability (CVE-2021-45116)
Apache Tomcat Permissions, Privileges, and Access Controls Vulnerability (CVE-2012-4431)
Lighttpd Resource Management Errors Vulnerability (CVE-2008-4298)