Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
fix bug #61367 - open_basedir bypass using libxml RSHUTDOWN
- Loading branch information
Showing
4 changed files
with
115 additions
and
5 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,58 @@ | ||
--TEST-- | ||
Bug #61367: open_basedir bypass in libxml RSHUTDOWN: read test | ||
--SKIPIF-- | ||
<?php if(!extension_loaded('dom')) echo 'skip'; ?> | ||
--INI-- | ||
open_basedir=. | ||
; Suppress spurious "Trying to get property of non-object" notices | ||
error_reporting=E_ALL & ~E_NOTICE | ||
--FILE-- | ||
<?php | ||
|
||
class StreamExploiter { | ||
public function stream_close ( ) { | ||
$doc = new DOMDocument; | ||
$doc->resolveExternals = true; | ||
$doc->substituteEntities = true; | ||
$dir = htmlspecialchars(dirname(getcwd())); | ||
$doc->loadXML( <<<XML | ||
<!DOCTYPE doc [ | ||
<!ENTITY file SYSTEM "file:///$dir/bad"> | ||
]> | ||
<doc>&file;</doc> | ||
XML | ||
); | ||
print $doc->documentElement->firstChild->nodeValue; | ||
} | ||
|
||
public function stream_open ( $path , $mode , $options , &$opened_path ) { | ||
return true; | ||
} | ||
} | ||
|
||
var_dump(mkdir('test_bug_61367')); | ||
var_dump(mkdir('test_bug_61367/base')); | ||
var_dump(file_put_contents('test_bug_61367/bad', 'blah')); | ||
var_dump(chdir('test_bug_61367/base')); | ||
|
||
stream_wrapper_register( 'exploit', 'StreamExploiter' ); | ||
$s = fopen( 'exploit://', 'r' ); | ||
|
||
?> | ||
--CLEAN-- | ||
<?php | ||
unlink('test_bug_61367/bad'); | ||
rmdir('test_bug_61367/base'); | ||
rmdir('test_bug_61367'); | ||
?> | ||
--EXPECTF-- | ||
bool(true) | ||
bool(true) | ||
int(4) | ||
bool(true) | ||
|
||
Warning: DOMDocument::loadXML(): I/O warning : failed to load external entity "file:///%s/test_bug_61367/bad" in %s on line %d | ||
|
||
Warning: DOMDocument::loadXML(): Failure to process entity file in Entity, line: 4 in %s on line %d | ||
|
||
Warning: DOMDocument::loadXML(): Entity 'file' not defined in Entity, line: 4 in %s on line %d |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,48 @@ | ||
--TEST-- | ||
Bug #61367: open_basedir bypass in libxml RSHUTDOWN: write test | ||
--SKIPIF-- | ||
<?php if(!extension_loaded('dom')) echo 'skip'; ?> | ||
--INI-- | ||
open_basedir=. | ||
; Suppress spurious "Trying to get property of non-object" notices | ||
error_reporting=E_ALL & ~E_NOTICE | ||
--FILE-- | ||
<?php | ||
|
||
class StreamExploiter { | ||
public function stream_close ( ) { | ||
$doc = new DOMDocument; | ||
$doc->appendChild($doc->createTextNode('hello')); | ||
var_dump($doc->save(dirname(getcwd()) . '/bad')); | ||
} | ||
|
||
public function stream_open ( $path , $mode , $options , &$opened_path ) { | ||
return true; | ||
} | ||
} | ||
|
||
var_dump(mkdir('test_bug_61367')); | ||
var_dump(mkdir('test_bug_61367/base')); | ||
var_dump(file_put_contents('test_bug_61367/bad', 'blah')); | ||
var_dump(chdir('test_bug_61367/base')); | ||
|
||
stream_wrapper_register( 'exploit', 'StreamExploiter' ); | ||
$s = fopen( 'exploit://', 'r' ); | ||
|
||
?> | ||
--CLEAN-- | ||
<?php | ||
@unlink('test_bug_61367/bad'); | ||
rmdir('test_bug_61367/base'); | ||
rmdir('test_bug_61367'); | ||
?> | ||
--EXPECTF-- | ||
bool(true) | ||
bool(true) | ||
int(4) | ||
bool(true) | ||
|
||
Warning: DOMDocument::save(): open_basedir restriction in effect. File(%s) is not within the allowed path(s): (.) in %s on line %d | ||
|
||
Warning: DOMDocument::save(%s): failed to open stream: Operation not permitted in %s on line %d | ||
bool(false) |