When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.

php: php: Denial of Service via out-of-bounds read in mysqlnd wire protocol parser php: PHP: Archive entry injection via integer overflow in TAR parser php: PHP: Denial of Service via reserved device names on Windows php: php: Denial of Service via unbounded recursion in SOAP parser php: php: Credential disclosure via cross-origin HTTP redirects php: php: Information disclosure via crafted TLS server certificate php: php: Access control bypass via partial IPv6 address comparison php: php: Information disclosure via out-of-bounds read in stream filters php: php: Out-of-bounds read via empty HTTP redirect Location header

Affected: Ubuntu:Pro:14.04:LTS: php5, Ubuntu:Pro:16.04:LTS: php7.0, Ubuntu:Pro:18.04:LTS: php7.2, Ubuntu:Pro:20.04:LTS: php7.4, Ubuntu:22.04:LTS: php8.1, Ubuntu:24.04:LTS: php8.3, Ubuntu:26.04:LTS: php8.5

[Unknown description]