A new Linux local-root vulnerability, nicknamed CIFSwitch by its discoverer Asim Manizada, was disclosed today on oss-security after the linux-distros embargo expired. A CVE has been requested but is not yet assigned at the time of writing. The flaw chains a userspace request-key helper from cifs-utils with a missing input check in the kernel’s CIFS client. Any unprivileged user on a system that has cifs-utils installed, the CIFS kernel module loadable, and unprivileged user namespaces enabled (the default on every supported AlmaLinux release) can pivot to root.
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CIFSwitch: Help Us Test the Patched Kernels
A new Linux local-root vulnerability, nicknamed CIFSwitch by its discoverer Asim Manizada, was disclosed today on oss-security after the linux-distros embargo expired. A CVE has been requested but is not yet assigned at the time of…
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Syntax validiert (0 Fehler)
title: Detect Exploitation - CIFSwitch: Help Us Test the Patched Kernels
id: 471fc762-c732-44f6-a17c-e389641e6719
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 = "CIFSwitch: Help Us Test the Pa" ascii wide
condition:
any of them
}Syntax validiert (0 Fehler)
index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("CIFSwitch Help Us Test the Patched Kerne")
| 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: "*CIFSwitch Help Us Test the Patched Kerne*"Syntax validiert (0 Fehler)
CommonSecurityLog
| where Message has "CIFSwitch Help Us Test the Patched Kerne"
| 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
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Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich CIFSwitch: Help Us Test the Patched Kern.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
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- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
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