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Cisco ASA/Firepower Threat Defense Session Initiation Protocol SIP Message Integer Underflow denial of service
A vulnerability classified as problematic was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (the affected version is unknown). This vulnerability affects an unknown code block of the component Session Initiation…
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A vulnerability classified as problematic was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (the affected version is unknown). This vulnerability affects an unknown code block of the component Session Initiation Protocol. Upgrading eliminates this vulnerability.
1. Sofort-Triage & Abwehrmaßnahmen
IR-PLAYBOOK-VULN-REMEDIATIONMEDIUM
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SOC Incident Playbook: Vulnerability Remediation & Verification
1-Click Detection Engineering: Multi-Dialect SIEM Rules5 Formate
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Syntax validiert (0 Fehler)
title: Detect Exploitation - Cisco ASA/Firepower Threat Defense Session Initiation Protocol SIP Message Integer Underflow denial of service
id: 8c736257-0b0f-43cb-a1f4-2803bfe5615c
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-25
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessSyntax validiert (0 Fehler)
rule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-25"
description = "YARA Signature for "
strings:
$str = "Cisco ASA/Firepower Threat Def" ascii wide
condition:
any of them
}Syntax validiert (0 Fehler)
index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("Cisco ASAFirepower Threat Defense Sessio")
| stats count earliest(_time) as first_seen latest(_time) as last_seen by src_ip, dest_ip, dest_host, signature
| eval first_seen=strftime(first_seen, "%Y-%m-%d %H:%M:%S"), last_seen=strftime(last_seen, "%Y-%m-%d %H:%M:%S")
| sort - countSyntax validiert (0 Fehler)
message: "*Cisco ASAFirepower Threat Defense Sessio*"Syntax validiert (0 Fehler)
CommonSecurityLog
| where Message has "Cisco ASAFirepower Threat Defense Sessio"
| summarize EventCount = count(), FirstSeen = min(TimeGenerated), LastSeen = max(TimeGenerated) by SourceIP, DestinationIP, DestinationPort, Activity
| extend DetectionRule = "iShareStuff-CTI-Compiled"
| sort by EventCount desc2. Cyber Threat Intelligence & Forensik
CTI Threat Relationship Graph2 Knoten / 1 Relationen
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MITRE ATT&CK Matrix Navigator 14 Taktiken
Reconnaissance
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Resource Development
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Initial Access
Execution
Persistence
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Privilege Escalation
Defense Evasion
Credential Access
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Discovery
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Lateral Movement
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Collection
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Command and Control
Exfiltration
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Impact
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich Cisco ASA/Firepower Threat Defense Sessi.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
- 1. Perimeter-Inspektion: Relevante Portfreigaben und exponierte Endpunkte unverzüglich scannen.
- 2. Patch-Applikation: Hersteller-Hotfix einspielen oder betroffene Daemons in isolierte DMZ-Segmente überführen.
- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
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