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Fix bug #80584: 0x and 0X are considered valid hex numbers by filter_var()

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Closes GH-6573
This commit is contained in:
George Peter Banyard 2021-01-04 15:24:53 +01:00
parent 9f96b2bdc8
commit 764b7bf108
3 changed files with 25 additions and 0 deletions
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4
NEWS
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@ -14,6 +14,10 @@ PHP NEWS
. Fixed bug #80537 (Wrong parameter type in DOMElement::removeAttributeNode
stub). (Nikita)
- Filter:
. Fixed bug #80584 (0x and 0X are considered valid hex numbers by
filter_var()). (girgias)
- MySQLi:
. Fixed bug #67983 (mysqlnd with MYSQLI_OPT_INT_AND_FLOAT_NATIVE fails to
interpret bit columns). (Nikita)

3
ext/filter/logical_filters.c
View file

@ -233,6 +233,9 @@ void php_filter_int(PHP_INPUT_FILTER_PARAM_DECL) /* {{{ */
p++; len--;
if (allow_hex && (*p == 'x' || *p == 'X')) {
p++; len--;
if (len == 0) {
RETURN_VALIDATION_FAILED
}
if (php_filter_parse_hex(p, len, &ctx_value) < 0) {
error = 1;
}

18
ext/filter/tests/bug80584.phpt Normal file
View file

@ -0,0 +1,18 @@
--TEST--
Bug #80584: "0x" and "0X" are considered valid hex numbers by filter_var()
--SKIPIF--
<?php
if (!extension_loaded('filter')) die('skip filter extension not available');
?>
--FILE--
<?php
var_dump(filter_var('0x', FILTER_VALIDATE_INT, FILTER_FLAG_ALLOW_HEX));
var_dump(filter_var('0X', FILTER_VALIDATE_INT, FILTER_FLAG_ALLOW_HEX));
var_dump(filter_var('', FILTER_VALIDATE_INT, FILTER_FLAG_ALLOW_HEX));
var_dump(filter_var('0', FILTER_VALIDATE_INT, FILTER_FLAG_ALLOW_HEX));
?>
--EXPECT--
bool(false)
bool(false)
bool(false)
int(0)