Title: u5CMS 3.9.3 Multiple Open Redirect Vulnerabilities
Advisory ID: ZSL-2015-5227
Type: Local/Remote
Impact: Spoofing
Risk: (2/5)
Release Date: 09.02.2015

Summary

u5CMS is a little, handy Content Management System for medium-sized websites, conference / congress / submission administration, review processes, personalized serial mails, PayPal payments and online surveys based on PHP and MySQL and Apache.

Description

Input passed via the 'uri' GET parameter in 'meta2.php' script and using Cookie 'pidvesa' is not properly verified before being used to redirect users. This can be exploited to redirect a user to an arbitrary website e.g. when a user clicks a specially crafted link to the affected script hosted on a trusted domain.

Vendor

Stefan P. Minder - http://www.yuba.ch

Affected Version

3.9.3 and 3.9.2

Tested On

Apache 2.4.10 (Win32)
PHP 5.6.3
MySQL 5.6.21

Vendor Status

[29.12.2014] Vulnerabilities discovered.
[04.02.2015] Contact with the vendor.
[04.02.2015] Vendor replies asking more details.
[05.02.2015] Sent details to the vendor.
[06.02.2015] Vendor releases version 3.9.4 to address these issues.
[09.02.2015] Coordinated public security advisory released.

PoC

u5cms_url.txt

Credits

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

References

[1] http://yuba.ch/index.php?c=u5cms&l=en
[2] http://xforce.iss.net/xforce/xfdb/100772
[3] http://cxsecurity.com/issue/WLB-2015020035
[4] http://packetstormsecurity.com/files/130317
[5] http://osvdb.org/show/osvdb/118206
[6] http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1578
[7] http://cve.mitre.org/cgi-bin/cvename.cgi?name=2015-1578

Changelog

[09.02.2015] - Initial release
[11.02.2015] - Added reference [2], [3] and [4]
[12.02.2015] - Added reference [5], [6] and [7]

Contact

Zero Science Lab

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