FSx

Accessing FSx for Windows, Lustre, or NetApp file systems exposed through share permissions and security groups.

1 ನಿಮಿಷದ ಓದುಅಕ್ಟೋ 7,2026 ರಂದು ನವೀಕರಿಸಲಾಗಿದೆflorianamette1 ಕೊಡುಗೆದಾರ
ನಿಮ್ಮ ಸಹಾಯಕವನ್ನು ಕೇಳಿ (MCP)GitHub ನಲ್ಲಿ ಸಂಪಾದಿಸಿ

FSx provides managed file systems in several flavours (Windows File Server over SMB, Lustre, OpenZFS, and NetApp ONTAP), each reachable over its native protocol inside a VPC. As with EFS, exposure comes down to the security group on the file system's network interface and the share's own permissions. A reachable SMB or NFS endpoint with weak share permissions hands over the data.

Finding file systems#

bash
aws fsx describe-file-systems \
  --query 'FileSystems[].[FileSystemId,FileSystemType,DNSName]'
aws fsx describe-file-systems --query 'FileSystems[].NetworkInterfaceIds'

Mounting the share#

bash
# FSx for Windows (SMB) from a reachable host
mount -t cifs //<dns-name>/share /mnt/fsx -o user=<user>,dom=<domain>

# FSx for Lustre
sudo mount -t lustre <dns-name>@tcp:/<mountname> /mnt/fsx

Exploitation notes#

  • FSx for Windows joins an Active Directory domain; a domain credential from the directory side often unlocks the share, linking the cloud and on-premises attack paths.
  • Lustre and OpenZFS mounts are gated mostly by network reachability, so an instance in the right subnet is usually enough.
  • Backups of FSx file systems also land in AWS Backup and are restorable from there.

Tools#

  • mount.cifs / mount.lustre: protocol-native mounts.
  • AWS CLI (fsx describe-file-systems): locate file systems and their interfaces.

References#

ಹಿಂದಿನದುBackupಮುಂದಿನದು Storage Gateway