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Fix GH-16189: underflow on preg_match/preg_match_all start_offset.

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close GH-16191
This commit is contained in:
David Carlier 2024-10-03 05:15:42 +01:00
parent f14e5cfaaa
commit f453d1ae2a
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3 changed files with 27 additions and 0 deletions
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3
NEWS
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@ -37,6 +37,9 @@ PHP NEWS
- OpenSSL:
. Fixed stub for openssl_csr_new. (Jakub Zelenka)
- PCRE:
. Fixed GH-16189 (underflow on offset argument). (David Carlier)
- PHPDBG:
. Fixed bug GH-15901 (phpdbg: Assertion failure on i funcs). (cmb)
. Fixed bug GH-16181 (phpdbg: exit in exception handler reports fatal error).

5
ext/pcre/php_pcre.c
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@ -1135,6 +1135,11 @@ static void php_do_pcre_match(INTERNAL_FUNCTION_PARAMETERS, int global) /* {{{ *
RETURN_FALSE;
}
if (start_offset == ZEND_LONG_MIN) {
zend_argument_value_error(5, "must be greater than " ZEND_LONG_FMT, ZEND_LONG_MIN);
RETURN_THROWS();
}
pce->refcount++;
php_pcre_match_impl(pce, subject, return_value, subpats,
global, ZEND_NUM_ARGS() >= 4, flags, start_offset);

19
ext/pcre/tests/gh16189.phpt Normal file
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@ -0,0 +1,19 @@
--TEST--
GH-16189 (preg_match/preg_match_all underflow on start_offset argument)
--FILE--
<?php
try {
preg_match( '/<(\w+)[\s\w\-]+ id="S44_i89ew">/', '<br><div id="S44_i89ew">', $matches, 0, PHP_INT_MIN);
} catch (\ValueError $e) {
echo $e->getMessage() . PHP_EOL;
}
try {
preg_match_all( '/<(\w+)[\s\w\-]+ id="S44_i89ew">/', '<br><div id="S44_i89ew">', $matches, 0, PHP_INT_MIN);
} catch (\ValueError $e) {
echo $e->getMessage() . PHP_EOL;
}
?>
--EXPECTF--
preg_match(): Argument #5 ($offset) must be greater than %s
preg_match_all(): Argument #5 ($offset) must be greater than %s