CVE-2018-13374
Fortinet FortiOS and FortiADC Improper Access Control Vulnerability
Fortinet FortiOS and FortiADC
A Improper Access Control in Fortinet FortiOS 6.0.2, 5.6.7 and before, FortiADC 6.1.0, 6.0.0 to 6.0.1, 5.4.0 to 5.4.4 allows attacker to obtain the LDAP server login credentials configured in FortiGate via pointing a LDAP server connectivity test request to a rogue LDAP server instead of the configured one.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 8 September 2022. US federal agencies were required to remediate it by 29 September 2022. CISA records this vulnerability as known to be used in ransomware campaigns.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 38.1%, which is higher than 98.6% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Frequently asked questions
Is CVE-2018-13374 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2018-13374.
What does CVE-2018-13374 affect?
CVE-2018-13374 affects Fortinet FortiOS and FortiADC. A Improper Access Control in Fortinet FortiOS 6.0.2, 5.6.7 and before, FortiADC 6.1.0, 6.0.0 to 6.0.1, 5.4.0 to 5.4.4 allows attacker to obtain the LDAP server login credentials configured in FortiGate via pointing a LDAP server connectivity test request to a rogue LDAP server instead of the configured one.
How severe is CVE-2018-13374?
CVE-2018-13374 is rated MEDIUM with a CVSS base score of 4.3. EPSS puts the probability of exploitation in the next 30 days at 38.1%, higher than 98.6% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 29 September 2022.
How should organisations respond to CVE-2018-13374?
Apply the vendor patch for Fortinet FortiOS and FortiADC as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.