Exploited vulnerability · CISA KEV

Is CVE-2018-13374 exploited? Yes: in CISA KEV since 8 Sep 2022

Gociux · Fortinet FortiOS and FortiADC · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-13374, Fortinet FortiOS and FortiADC Improper Access Control Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 8 Sep 2022, 1325 days after it was published. It is known to be used in ransomware campaigns. It affects Fortinet FortiOS and FortiADC, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

Fortinet FortiOS and FortiADC contain an improper access control vulnerability that allows attackers to obtain the LDAP server login credentials configured in FortiGate by pointing a LDAP server connectivity test request to a rogue LDAP server.

What to do

1. Check whether you run it. Look for FortiOS and FortiADC in your asset inventory, including appliances and cloud images. Stack check lists every exploited Fortinet CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 22 Jan 2019.
4. Get told next time. Email alerts when CISA adds a CVE for Fortinet.

References

• www.fortiguard.com/psirt/FG-IR-18-157
• nvd.nist.gov/vuln/detail/CVE-2018-13374

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in September 2022 · Fortinet scorecard · act-now radar.