1. OVERVIEW Open-Realty 2.5.8 and lower versions are vulnerable to Local File Inclusion. 2. BACKGROUND Open-Realty is the world's leading real estate listing marketing and management CMS application, and has enjoyed being the real estate web site software of choice for professional web site developers since 2002. 3. VULNERABILITY DESCRIPTION Open-Realty contains a flaw that may allow a remote attacker to execute arbitrary commands or code. The issue is due to the 'index.php' script not properly sanitizing user input, specifically directory traversal style attacks (e.g., ../../) supplied to the 'select_users_template' parameter. This may allow an attacker to include a file from the targeted host that contains arbitrary commands or code that will be executed by the vulnerable script. Such attacks are limited due to the script only calling files already on the target host. In addition, this flaw can potentially be used to disclose the contents of any file on the system accessible by the web server. 4. VERSIONS AFFECTED 2.5.8 (2.x.x) <= 5. PROOF-OF-CONCEPT/EXPLOIT http://localhost/open-realty2.5.8/?select_users_template=../../../../../../../../../../../../../../../etc/passwd%00 6. SOLUTION The version 2.5.x version family is no longer maintained by the vendor. The version 3.x.x is not found to be vulnerable to this issue. Upgrade to the latest 3.x.x version. 7. VENDOR Transparent Technologies Inc. http://www.transparent-support.com 8. CREDIT Aung Khant, http://yehg.net, YGN Ethical Hacker Group, Myanmar. 9. DISCLOSURE TIME-LINE 2012-03-05: Open-Realty 2.5.8 in End-of-Support/Maintenance circle 2012-03-05: Vulnerability disclosed 10. REFERENCES Original Advisory URL: http://yehg.net/lab/pr0js/advisories/%5Bopen-realty_2.5.8_2.x%5D_lfi Open-Realty Home Page: http://www.open-realty.org/ CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP File Inclusion') CAPEC-252: PHP Local File Inclusion #yehg [2012-03-05]