title: X-Forwarded-For header is active by default causes access to Zabbix sites in maintenance mode
description: Zabbix Frontend provides a feature that allows admins to maintain the installation and ensure that only certain IP addresses can access it. In this way, any user will not be able to access the Zabbix Frontend while it is being maintained and possible sensitive data will be prevented from being disclosed. An attacker can bypass this protection and access the instance using IP address not listed in the defined range.
problem types: CWE-20 Improper Input Validation
affected:
{
vendor: Zabbix
product: Frontend
versions:
version: 4.0.0-4.0.44, status: affected
version: 5.0.0-5.0.29, status: affected
version: 6.0.0-6.0.9, status: affected
version: 6.2.0-6.2.4, status: affected
version: 5.0.30rc1, status: unaffected, lessThan: unspecified, versionType: custom
version: 6.0.11rc1, status: unaffected, lessThan: unspecified, versionType: custom
version: 6.2.5rc1, status: unaffected, lessThan: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: LOW
availabilityImpact: NONE
baseScore: 5.3
baseSeverity: MEDIUM
]
solutions: To remediate this vulnerability, apply the updates listed in the 'Unaffected' section to appropriate products or use the workaround
workarounds: If an immediate update is not possible, limit network access to Zabbix Frontend during the maintenance window.