CVE-2023-0568

A vulnerability was found in PHP. This security issue occurs because the core path resolution function allocates a buffer one byte small. Resolving paths with lengths close to the system MAXPATHLEN setting may lead to the byte after the allocated buffer being overwritten with a NULL value, which might lead to unauthorized data access or modification.

It was discovered that PHP incorrectly handled certain invalid Blowfish password hashes. An invalid password hash could possibly allow applications to accept any password as valid, contrary to expectations. It was discovered that PHP incorrectly handled resolving long paths. A remote attacker could possibly use this issue to obtain or modify sensitive information. It was discovered that PHP incorrectly handled a large number of parts in HTTP form uploads. A remote attacker could possibly use this issue to cause PHP to consume resources, leading to a denial of service.