Statement on Falcon Content Update for Windows Hosts

 

CrowdStrike is actively working with customers impacted by a defect found in a single content update for Windows hosts. Mac and Linux hosts are not impacted. This was not a cyberattack.

The issue has been identified, isolated and a fix has been deployed. We refer customers to the support portal for the latest updates and will continue to provide complete and continuous updates on our website.

We further recommend organizations ensure they’re communicating with CrowdStrike representatives through official channels.

Our team is fully mobilized to ensure the security and stability of CrowdStrike customers.

Updated 1:25pm ET, July 19, 2024:

We understand the gravity of the situation and are deeply sorry for the inconvenience and disruption. We are working with all impacted customers to ensure that systems are back up and they can deliver the services their customers are counting on.

We assure our customers that CrowdStrike is operating normally and this issue does not affect our Falcon platform systems. If your systems are operating normally, there is no impact to their protection if the Falcon Sensor is installed.

Below is the latest CrowdStrike Tech Alert with more information about the issue and workaround steps organizations can take. We will continue to provide updates to our community and the industry as they become available.

Summary

• CrowdStrike is aware of reports of crashes on Windows hosts related to the Falcon Sensor.

Details

• Symptoms include hosts experiencing a bugcheck\blue screen error related to the Falcon Sensor.
• Windows hosts which have not been impacted do not require any action as the problematic channel file has been reverted.
• Windows hosts which are brought online after 0527 UTC will also not be impacted
• Hosts running Windows 7/2008 R2 are not impacted
• This issue is not impacting Mac- or Linux-based hosts
• Channel file “C-00000291*.sys” with timestamp of 0527 UTC or later is the reverted (good) version.
• Channel file “C-00000291*.sys” with timestamp of 0409 UTC is the problematic version.
  • Note: It is normal for multiple “C-00000291*.sys files to be present in the CrowdStrike directory – as long as one of the files in the folder has a timestamp of 0527 UTC or later, that will be the active content.

Current Action

• CrowdStrike Engineering has identified a content deployment related to this issue and reverted those changes.
• If hosts are still crashing and unable to stay online to receive the Channel File Changes, the workaround steps below can be used to address this issue.
• We assure our customers that CrowdStrike is operating normally and this issue does not affect our Falcon platform systems. If your systems are operating normally, there is no impact to their protection if the Falcon Sensor is installed. Falcon Complete and Overwatch services are not disrupted by this incident.