New CrowdStrike 'FalconFlank' zero-day grants SYSTEM privileges
New CrowdStrike 'FalconFlank' zero-day grants SYSTEM privileges. The security researcher known as Chaotic Eclipse (aka INFINITE NIGHTMARE, MSNightmare, and Nightmare-Eclipse) has dropped a new zero-day dubbed FalconFlank, a proof-of-concept (PoC) for a...
What happened
An anonymous security researcher who uses the "Nightmare Eclipse" handle released a CrowdStrike Falcon zero-day exploit named "FalconFlank" that lets attackers escalate privileges on up-to-date Windows systems. New CrowdStrike 'FalconFlank' zero-day grants SYSTEM privileges. The security researcher known as Chaotic Eclipse (aka INFINITE NIGHTMARE, MSNightmare, and Nightmare-Eclipse) has dropped a new zero-day dubbed FalconFlank, a proof-of-concept (PoC) for a privilege escalation flaw impacting Crowdstrike Falcon.
"FalconFlank is a 0-day privilege escalation that abuses the office malicious macros remediation in CrowdStrike Falcon Sensor," the researcher said in. Researcher Releases FalconFlank PoC Showing Privilege Escalation in CrowdStrike Falcon.
Editorial note: this News Brief follows the available evidence and adds length only when additional facts or useful context are available. Where public reporting does not establish a specific victim sequence, CyberDeltaForce does not present one as fact.
What the reporting and advisory establish
An anonymous security researcher who uses the "Nightmare Eclipse" handle released a CrowdStrike Falcon zero-day exploit named "FalconFlank" that lets attackers escalate privileges on up-to-date Windows systems.
"FalconFlank is a 0-day privilege escalation that abuses the office malicious macros remediation in CrowdStrike Falcon Sensor," the researcher said in
New CrowdStrike 'FalconFlank' zero-day grants SYSTEM privileges
The security researcher known as Chaotic Eclipse (aka INFINITE NIGHTMARE, MSNightmare, and Nightmare-Eclipse) has dropped a new zero-day dubbed FalconFlank, a proof-of-concept (PoC) for a privilege escalation flaw impacting Crowdstrike Falcon. "FalconFlank is a 0-day privilege escalation that abuses the office malicious macros remediation in CrowdStrike Falcon Sensor," the researcher said in
Researcher Releases FalconFlank PoC Showing Privilege Escalation in CrowdStrike Falcon
What this means for your environment
Move from the published facts to the technical path, exposure conditions and defensive decisions that matter in a real environment.
Attack & Exploitation Path
The sequence below shows the supported access, exploitation and impact path. Evidence status is shown at every stage.
a vulnerability or exploit is part of the activity.
elevated or administrative access is mentioned.
Why this matters to you
The significance depends on whether the organizations, technologies or threat behavior in this story intersect with your environment. The useful next step is to compare the reported facts with your own exposure, suppliers and current threat model.
Does this deserve attention in my environment?
Check the conditions below against your use of Windows.
Select the conditions that are true in your environment. Leaving a condition unselected does not mean you are safe — it only means you have not marked it as applicable.
- Identify affected products, services or components in the environment and determine which instances are internet-facing or business-critical.
- Review vendor guidance and prioritize remediation using exposure, exploitability and asset criticality.
- Search endpoint, network, identity and application telemetry for suspicious activity associated with the affected technology.
- Apply the vendor patch or mitigation, validate the control after remediation and continue monitoring for exploitation attempts.
Sources & References
Original reporting and technical references are kept here for readers who want to verify the facts. Publisher names stay out of the reading flow above.