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Fix GH-25090: UAF in phar rename() of an entry with metadata #25098

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Fix GH-25090: UAF in phar rename() of an entry with metadata #25098

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1 change: 1 addition & 0 deletions ext/phar/stream.c
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Original file line number Diff line number Diff line change
Expand Up @@ -852,6 +852,7 @@ static int phar_wrapper_rename(php_stream_wrapper *wrapper, const char *url_from
entry->is_deleted = 1;
entry->fp = NULL;
ZVAL_UNDEF(&entry->metadata_tracker.val);
entry->metadata_tracker.str = NULL;
entry->link = entry->tmp = NULL;
source = entry;

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25 changes: 25 additions & 0 deletions ext/phar/tests/gh25090.phpt
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@@ -0,0 +1,25 @@
--TEST--
GH-25090 (Use-after-free in phar_wrapper_rename() with entry metadata)
--EXTENSIONS--
phar
--INI--
phar.readonly=0
--FILE--
<?php
$fname = __DIR__ . '/gh25090.phar';
$phar = new Phar($fname);
$phar['a'] = 'x';
$phar['a']->setMetadata(['k' => 'v']);
rename('phar://' . $fname . '/a', 'phar://' . $fname . '/b');
$phar['c'] = 'y';
var_dump($phar['b']->getMetadata());
?>
--CLEAN--
<?php
@unlink(__DIR__ . '/gh25090.phar');
?>
--EXPECT--
array(1) {
["k"]=>
string(1) "v"
}
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