[Bug 655442] [NEW] memory content leak when using invalid utf-8 with XMLWriter::writeAttribute

[Kees Cook]

*** This bug is a security vulnerability ***

Public security bug reported:

Binary package hint: php5

It seems that PHP is not correctly using libxml2's xmlwriter routines,
and allows passing in invalid utf-8 strings which are then misparsed by
libxml2, allowing memory contents to leak into the resulting output.

Actual output:
PHP Warning:  XMLWriter::writeAttribute(): string is not in UTF-8 in 
/tmp/xmlwriter.php on line 12
<input value="&#x40;&#xB1;�ˋ[����ĹJ���R���Q"/>

Expected output:
<input value="&#xe0;&#e81"/>

** Affects: php
     Importance: Unknown
         Status: Unknown

** Affects: php5 (Ubuntu)
     Importance: Low
         Status: Confirmed

** This bug has been flagged as a security vulnerability

-- 
memory content leak when using invalid utf-8 with XMLWriter::writeAttribute
https://bugs.launchpad.net/bugs/655442
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