Zabbix < 1.8.16 / 2.0.5 / 2.1.0 user.login cnf Parameter Authentication Bypass

medium Nessus Plugin ID 66945


The remote web application may be affected by an authentication bypass vulnerability.


According to its self-reported version number, the instance of Zabbix listening on the remote host is a version greater than 1.8.1 prior to 1.8.16, or version 2.0.x prior to 2.0.5. It, therefore, could be affected by an authentication bypass flaw in the 'user.login' method. The issue is triggered when LDAP authentication requests passed via the 'cnf' parameter are not properly handled. A remote attacker could override the stored LDAP settings to redirect to authentication.

Note that Nessus has not tested for these issues but has instead relied on the version in the Zabbix login page.


Update Zabbix to version 1.8.16 / 2.0.5 / 2.1.0 or later.

See Also

Plugin Details

Severity: Medium

ID: 66945

File Name: zabbix_frontend_1_8_16.nasl

Version: 1.9

Type: remote

Family: CGI abuses

Published: 6/20/2013

Updated: 4/11/2022

Configuration: Enable paranoid mode, Enable thorough checks

Risk Information


Risk Factor: Low

Score: 3.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2013-1364

Vulnerability Information

CPE: cpe:/a:zabbix:zabbix

Required KB Items: Settings/ParanoidReport, www/zabbix

Exploit Ease: No exploit is required

Patch Publication Date: 1/4/2013

Vulnerability Publication Date: 12/20/2012

Reference Information

CVE: CVE-2013-1364

BID: 57471