The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is tracked separately from the string itself. The filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte, while keeping the original length. When the filter later emits a line break it copies the recorded length out of the truncated allocation, reading past its end and placing adjacent heap bytes into the filter output.

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]