From: moriyoshi
Operating system: Irrelevant
PHP version: Irrelevant
Package: mbstring related
Bug Type: Bug
Bug description:mb_strcut() returns garbage with the excessive length parameter
Description:
------------
mb_strcut() returns garbage when the following conditions are met:
1. The value specified to length parameter exceeds the length of the
subject
string.
2. mbstring.internal_encoding is set to some single-byte encoding.
The garbage may consist of uncleared part of the heap that has previously
been
used for some purpose, which could lead to unexpected information
exposure.
This bug was originally reported by Mateusz Kocielski.
Test script:
---------------
<?php
$b = "bbbbbbbbbbb";
str_repeat("THIS IS A SECRET MESSAGE, ISN'T IT?", 1);
$var3 = mb_strcut($b, 0, 1000);
echo $var3;
?>
Expected result:
----------------
bbbbbbbbbbb
Actual result:
--------------
bbbbbbbbbbb??????D$Ð=m???=m?(?=m?`?=m??5<m??=m?THIS IS A SECRET MESSAGE,
ISN'T
it??...@?=m?(?=m???=m?p?=m?var3
--
Edit bug report at http://bugs.php.net/bug.php?id=53273&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53273&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53273&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53273&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53273&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53273&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53273&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53273&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53273&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53273&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53273&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53273&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53273&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53273&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53273&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53273&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53273&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53273&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53273&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53273&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53273&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53273&r=mysqlcfg
