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CVE-2026-20222

HIGH(7.4)

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Risk Signal Score29/100 — MITTEL
  • CVSS 7.4 — Hoch
  • Weniger als 24 Stunden alt

Erwähnungen (letzte 60 Tage)

Artikel

Beschreibung

A vulnerability in the EIGRP implementation in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper resource management when handling EIGRP update messages. An attacker could exploit this vulnerability by sending crafted EIGRP updates at a high rate to an affected device. A successful exploit could allow the attacker to trigger a memory leak that will eventually cause the affected device to reload unexpectedly.

Erkennung & Indikatoren

Ausnutzung

In den geprüften Quellen nicht genannt

Threat-Hunting-Queries

Sentinel/Defender KQL

DeviceNetworkEvents
| where ActionType == "EIGRP Update" and RemoteIP != "" // Adjust based on EIGRP update message patterns
| summarize EventCount = count() by DeviceId, RemoteIP
| where EventCount > 100 // Threshold for high rate, adjust as needed
| project DeviceId, RemoteIP, EventCount

Splunk SPL

sourcetype="cisco:asa" OR sourcetype="cisco:ftd" (eigrp AND update) | stats count by host, src_ip | where count > 100

Sigma

title: Cisco ASA/FTD EIGRP DoS Attempt
logsource:
  product: cisco
  service: asa_ftd
detection:
  selection:
    event_type: eigrp_update
    # Further refine based on specific log patterns for EIGRP updates if available
  timeframe: 5m
  condition: selection | stats count() by src_ip | where count() > 100
  level: high

Elastic ES|QL

from logs-cisco.asa-*, logs-cisco.ftd-*
| where message : "EIGRP update" // Adjust based on actual log content for EIGRP updates
| summarize event_count = count() by host.name, source.ip
| where event_count > 100

SecBoard-generated · behavioral · requires customization — Von SecBoard erzeugt und nicht in einer Zielumgebung validiert. Vor dem Einsatz an die eigene Protokollierung anpassen.

Referenzen