[ISecAuditors Security Advisories] Multiple Full Path Disclosure Vulnerabilities in TinyWebGallery <= v1.8.9

2013-05-0600:00:00

vulners.com

JSON

=============================================
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.