Title: Zen Cart v1.3.9f (typefilter) Local File Inclusion Vulnerability
Advisory ID: ZSL-2010-4967
Type: Local
Impact: System Access, Exposure of System Information, Exposure of Sensitive Information
Risk: (3/5)
Release Date: 01.10.2010

Summary

Zen Cart is an online store management system. It is PHP-based, using a MySQL database and HTML components. Support is provided for numerous languages and currencies, and it is freely available under the GNU GPL.

Description

Zen Cart v1.3.9f suffers from a file inlcusion vulnerability (LFI) / file disclosure vulnerability (FD) when input passed thru the "typefilter" parameter to index.php is not properly verified before being used to include files. This can be exploited to include files from local resources with directory traversal attacks and URL encoded NULL bytes.

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if (isset($_GET['typefilter'])) $typefilter = $_GET['typefilter'];

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Vendor

Zen Ventures, LLC - http://www.zen-cart.com

Affected Version

1.3.9f

Tested On

Microsoft Windows XP Professional SP3 (EN)
PHP 5.3.0
MySQL 5.1.36
Apache 2.2.11 (Win32)

Vendor Status

[19.08.2010] Vulnerability discovered.
[22.08.2010] Vendor contacted.
[22.08.2010] Vendor responds asking more details.
[23.08.2010] Sent PoC files to vendor.
[25.08.2010] Vendor confirms vulnerability.
[02.09.2010] Asked vendor for patch release date.
[08.09.2010] Vendor states approximately 7 days to patch release.
[20.09.2010] Asked vendor for status.
[24.09.2010] Asked vendor for status again because of no reply from previous mail.
[28.09.2010] Vendor informed about advisory release date.
[29.09.2010] Vendor releases version 1.3.9g to address this issue.
[01.10.2010] Public advisory released.

PoC

zencart_lfi.txt

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] http://www.zen-cart.com/forum/showthread.php?t=165017
[2] http://www.exploit-db.com/exploits/15166/
[3] http://securityreason.com/wlb_show/WLB-2010100007
[4] http://www.packetstormsecurity.org/filedesc/ZSL-2010-4967.txt.html
[5] http://www.securityfocus.com/bid/43628
[6] http://secunia.com/advisories/41666
[7] http://osvdb.org/show/osvdb/68300
[8] http://www.phc.ir/thread3366.html

Changelog

[01.10.2010] - Initial release
[02.10.2010] - Added reference [7]
[04.10.2010] - Added reference [8]

Contact

Zero Science Lab

Web: http://www.zeroscience.mk
e-mail: lab@zeroscience.mk