FORTINET Security Advisory
Published Date: Not specified
Advisory Summary
🛑 ⚠️ Uncontrolled Resource Consumption in SNMP (FortiAnalyzer SNMP daemon)
Fortinet has reported a CWE-457 (Use of Uninitialized Variable) issue in the FortiAnalyzer SNMP daemon. A remote, authenticated attacker (with user permission) may trigger a denial of service by abusing SNMP GETBULK requests, leading to uncontrolled resource consumption.
- Service disruption (DoS) of the FortiAnalyzer SNMP service
- Potential instability depending on how the device handles excessive/abusive GETBULK traffic
- Threat is constrained to authenticated attackers, but “user permission” implies not necessarily full admin access
- CVE/PSIRT: Fortinet PSIRT advisory FG-IR-26-172
- Impact: Denial of Service
- Attack vector: SNMP GETBULK via SNMP daemon
- Severity (CVSSv3): 5.9 (moderate)
🛡️ Actionable recommendations (do now)
1. Apply the Fortinet PSIRT fix from the advisory (or upgrade to the patched release).
2. Restrict SNMP exposure at the network layer (management VLAN ACLs, allowlists, disable SNMP where not required).
3. Harden SNMP usage: limit permitted SNMP versions/features and tightly control “user permission” roles that can reach SNMP interfaces.
4. Monitor for abuse patterns: elevated SNMP GETBULK request rates, repeated polling bursts, or abnormal source IP behavior.
⚠️ Operational note
If your environment integrates SNMP polling for analytics/workflows, plan remediation during a window that won’t break monitoring, and validate post-upgrade SNMP behavior with your polling clients.
🧾
-457
Reference: Vendor Advisory