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Fix #73246: XMLReader: encoding length not checked #6899

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Fix #73246: XMLReader: encoding length not checked #6899

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10 changes: 10 additions & 0 deletions ext/xmlreader/php_xmlreader.c
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Original file line number Diff line number Diff line change
Expand Up @@ -873,6 +873,11 @@ PHP_METHOD(xmlreader, open)
RETURN_FALSE;
}

if (encoding && CHECK_NULL_PATH(encoding, encoding_len)) {
php_error_docref(NULL, E_WARNING, "Encoding must not contain NUL bytes");
RETURN_FALSE;
}

valid_file = _xmlreader_get_valid_file_path(source, resolved_path, MAXPATHLEN );

if (valid_file) {
Expand Down Expand Up @@ -1055,6 +1060,11 @@ PHP_METHOD(xmlreader, XML)
RETURN_FALSE;
}

if (encoding && CHECK_NULL_PATH(encoding, encoding_len)) {
php_error_docref(NULL, E_WARNING, "Encoding must not contain NUL bytes");
RETURN_FALSE;
}

inputbfr = xmlParserInputBufferCreateMem(source, source_len, XML_CHAR_ENCODING_NONE);

if (inputbfr != NULL) {
Expand Down
16 changes: 16 additions & 0 deletions ext/xmlreader/tests/bug73246.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
--TEST--
Bug #73246 (XMLReader: encoding length not checked)
--SKIPIF--
<?php
if (!extension_loaded("xmlreader")) die("skip xmlreader extension not available");
?>
--FILE--
<?php
$reader = new XMLReader();
$reader->open(__FILE__, "UTF\0-8");
$reader->XML('<?xml version="1.0"?><root/>', "UTF\0-8");
?>
--EXPECTF--
Warning: XMLReader::open(): Encoding must not contain NUL bytes in %s on line %d

Warning: XMLReader::XML(): Encoding must not contain NUL bytes in %s on line %d