From 4d2560dd6a115dee81821e2b0fe6751e61f5c2c0 Mon Sep 17 00:00:00 2001 From: "Christoph M. Becker" Date: Tue, 21 Jul 2020 11:07:43 +0200 Subject: [PATCH] Fix #79877: getimagesize function silently truncates after a null byte We have to check for NUL bytes if `getimagesize()` has been called. --- ext/standard/image.c | 5 +++++ ext/standard/tests/image/bug79877.phpt | 9 +++++++++ 2 files changed, 14 insertions(+) create mode 100644 ext/standard/tests/image/bug79877.phpt diff --git a/ext/standard/image.c b/ext/standard/image.c index aaaf81ae9e..eeb48ea223 100644 --- a/ext/standard/image.c +++ b/ext/standard/image.c @@ -1496,6 +1496,11 @@ static void php_getimagesize_from_any(INTERNAL_FUNCTION_PARAMETERS, int mode) { Z_PARAM_ZVAL(info) ZEND_PARSE_PARAMETERS_END(); + if (mode == FROM_PATH && CHECK_NULL_PATH(input, input_len)) { + php_error_docref(NULL, E_WARNING, "Invalid path"); + return; + } + if (argc == 2) { info = zend_try_array_init(info); if (!info) { diff --git a/ext/standard/tests/image/bug79877.phpt b/ext/standard/tests/image/bug79877.phpt new file mode 100644 index 0000000000..92e93e59e5 --- /dev/null +++ b/ext/standard/tests/image/bug79877.phpt @@ -0,0 +1,9 @@ +--TEST-- +Bug #79877 (getimagesize function silently truncates after a null byte) +--FILE-- + +--EXPECTF-- +Warning: getimagesize(): Invalid path in %s on line %d +NULL -- 2.40.0