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Merge branch 'PHP-8.3' into PHP-8.4

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* PHP-8.3:
  Fix GH-20439: xml_set_default_handler() does not properly handle special characters in attributes when passing data to callback (#20453)
This commit is contained in:
Niels Dossche
2025-11-11 22:47:54 +01:00
parent e504ab778c 3cc36b0b5e
commit 0ad340fdcf
4 changed files with 74 additions and 82 deletions
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4
NEWS
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@@ -29,6 +29,10 @@ PHP NEWS
- Tidy:
. Fixed bug GH-20374 (PHP with tidy and custom-tags). (ndossche)
- XML:
. Fixed bug GH-20439 (xml_set_default_handler() does not properly handle
special characters in attributes when passing data to callback). (ndossche)
20 Nov 2025, PHP 8.4.15
- Core:

106
ext/xml/compat.c
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@@ -34,6 +34,28 @@ qualify_namespace(XML_Parser parser, const xmlChar *name, const xmlChar *URI, xm
}
}
static void start_element_emit_default(XML_Parser parser)
{
if (parser->h_default) {
/* Grammar does not allow embedded '<' and '>' in elements, so we can seek to the start and end positions.
* Since the parser in the current mode mode is non-progressive, it contains the entire input. */
const xmlChar *cur = parser->parser->input->cur;
const xmlChar *end = cur;
for (const xmlChar *base = parser->parser->input->base; cur > base && *cur != '<'; cur--);
if (*end == '/') {
/* BC: Keep split between start & end element.
* TODO: In the future this could be aligned with expat and only emit a start event, or vice versa.
* See gh20439_2.phpt */
xmlChar *tmp = BAD_CAST estrndup((const char *) cur, end - cur + 1);
tmp[end - cur] = '>';
parser->h_default(parser->user, tmp, end - cur + 1);
efree(tmp);
} else {
parser->h_default(parser->user, cur, end - cur + 1);
}
}
}
static void
start_element_handler(void *user, const xmlChar *name, const xmlChar **attributes)
{
@@ -41,29 +63,7 @@ start_element_handler(void *user, const xmlChar *name, const xmlChar **attribute
xmlChar *qualified_name = NULL;
if (parser->h_start_element == NULL) {
if (parser->h_default) {
int attno = 0;
qualified_name = xmlStrncatNew((xmlChar *)"<", name, xmlStrlen(name));
if (attributes) {
while (attributes[attno] != NULL) {
int att_len;
char *att_string, *att_name, *att_value;
att_name = (char *)attributes[attno++];
att_value = (char *)attributes[attno++];
att_len = spprintf(&att_string, 0, " %s=\"%s\"", att_name, att_value);
qualified_name = xmlStrncat(qualified_name, (xmlChar *)att_string, att_len);
efree(att_string);
}
}
qualified_name = xmlStrncat(qualified_name, (xmlChar *)">", 1);
parser->h_default(parser->user, (const XML_Char *) qualified_name, xmlStrlen(qualified_name));
xmlFree(qualified_name);
}
start_element_emit_default(parser);
return;
}
@@ -89,65 +89,7 @@ start_element_handler_ns(void *user, const xmlChar *name, const xmlChar *prefix,
}
if (parser->h_start_element == NULL) {
if (parser->h_default) {
if (prefix) {
qualified_name = xmlStrncatNew((xmlChar *)"<", prefix, xmlStrlen(prefix));
qualified_name = xmlStrncat(qualified_name, (xmlChar *)":", 1);
qualified_name = xmlStrncat(qualified_name, name, xmlStrlen(name));
} else {
qualified_name = xmlStrncatNew((xmlChar *)"<", name, xmlStrlen(name));
}
if (namespaces) {
int i, j;
for (i = 0,j = 0;j < nb_namespaces;j++) {
int ns_len;
char *ns_string, *ns_prefix, *ns_url;
ns_prefix = (char *) namespaces[i++];
ns_url = (char *) namespaces[i++];
if (ns_prefix) {
ns_len = spprintf(&ns_string, 0, " xmlns:%s=\"%s\"", ns_prefix, ns_url);
} else {
ns_len = spprintf(&ns_string, 0, " xmlns=\"%s\"", ns_url);
}
qualified_name = xmlStrncat(qualified_name, (xmlChar *)ns_string, ns_len);
efree(ns_string);
}
}
if (attributes) {
for (i = 0; i < nb_attributes; i += 1) {
int att_len;
char *att_string, *att_name, *att_value, *att_prefix, *att_valueend;
att_name = (char *) attributes[y++];
att_prefix = (char *)attributes[y++];
y++;
att_value = (char *)attributes[y++];
att_valueend = (char *)attributes[y++];
if (att_prefix) {
att_len = spprintf(&att_string, 0, " %s:%s=\"", att_prefix, att_name);
} else {
att_len = spprintf(&att_string, 0, " %s=\"", att_name);
}
qualified_name = xmlStrncat(qualified_name, (xmlChar *)att_string, att_len);
qualified_name = xmlStrncat(qualified_name, (xmlChar *)att_value, att_valueend - att_value);
qualified_name = xmlStrncat(qualified_name, (xmlChar *)"\"", 1);
efree(att_string);
}
}
qualified_name = xmlStrncat(qualified_name, (xmlChar *)">", 1);
parser->h_default(parser->user, (const XML_Char *) qualified_name, xmlStrlen(qualified_name));
xmlFree(qualified_name);
}
start_element_emit_default(parser);
return;
}
qualify_namespace(parser, name, URI, &qualified_name);

24
ext/xml/tests/gh20439_1.phpt Normal file
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@@ -0,0 +1,24 @@
--TEST--
GH-20439 (xml_set_default_handler() does not properly handle special characters in attributes when passing data to callback)
--EXTENSIONS--
xml
--FILE--
<?php
$x = xml_parser_create_ns('utf-8');
xml_set_default_handler($x, function( $_parser, $data ) { var_dump($data); });
$input = "<!-- xxx --><foo attr1='\"&lt;&quot;&#9;&#x0A;&#x0D;&#13;𐍅' attr2=\"&quot;&lt;\"></foo>";
$inputs = str_split($input);
// Test chunked parser wrt non-progressive parser
foreach ($inputs as $input) {
xml_parse($x, $input, false);
}
xml_parse($x, "", true);
?>
--EXPECT--
string(12) "<!-- xxx -->"
string(71) "<foo attr1='"&lt;&quot;&#9;&#x0A;&#x0D;&#13;𐍅' attr2="&quot;&lt;">"
string(6) "</foo>"

22
ext/xml/tests/gh20439_2.phpt Normal file
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@@ -0,0 +1,22 @@
--TEST--
GH-20439 (xml_set_default_handler() does not properly handle special characters in attributes when passing data to callback) - closing solidus variant
--EXTENSIONS--
xml
--SKIPIF--
<?php
require __DIR__ . '/libxml_expat_skipif.inc';
skipif(want_expat: false);
?>
--FILE--
<?php
$x = xml_parser_create_ns('utf-8');
xml_set_default_handler($x, function( $_parser, $data ) { var_dump($data); });
$input = "<ns:test xmlns:ns='urn:x' />";
xml_parse($x, $input, true);
?>
--EXPECT--
string(29) "<ns:test xmlns:ns='urn:x' >"
string(10) "</ns:test>"