The command curl -X PUT "http://169.254.169" is essential for generating a Session Token required to access Amazon Web Services (AWS) Instance Metadata Service Version 2 (IMDSv2). This method secures EC2 instance metadata access by mitigating Server-Side Request Forgery (SSRF) vulnerabilities, requiring a token rather than allowing direct, unauthenticated access.
A compromised Docker image might run this command at startup, exfiltrate the token to a remote server, and silently give the attacker access to the cloud environment. curl-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fapi-2Ftoken
…then an attacker who finds it can and attempt to run it against any target server they control — or worse, if they have network access to your cloud environment, they can run it against your instance metadata service. The command curl -X PUT "http://169