Donato Ferrante Application: DirectContact http://reyero.info/dc/ Version: 0.3b Bug: directory traversal Date: 27-Feb-2006 Author: Donato Ferrante e-mail: fdonato (at) autistici (dot) org [email concealed] web: www.autistici.org/fdonato xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1. Description 2. The bug 3. The code 4. The fix xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ---------------- 1. Description: ---------------- Vendor's Description: "DirectContact turns your computer in real "friendly" HTTP server." xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ------------ 2. The bug: ------------ The program is unable to manage malicious patterns like .. or ../. So an attacker can go out the document root assigned to the webserver and see/download all the files available on the remote system. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ------------- 3. The code: ------------- To test the vulnerability: via browser: http://[host]:[port]/........windows/system.ini via raw request: GET /../../../../../../windows/system.ini HTTP/1.1 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ------------ 4. The fix: ------------ Vendor has been contacted. Bug will be fixed in the next release. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx