This exact scenario has been used in CTF competitions and bug bounty reports, with payouts often exceeding $10,000.
Dissecting the SSRF Classic: http://169.254.169.254/latest/meta-data/
: Specifies that the request is looking for identity-related info. This exact scenario has been used in CTF
If an attacker enters http://169.254.169 into a poorly secured webhook field, they are attempting an . They are trying to trick the cloud server into making a request to its own internal metadata service. The Attack Scenario:
These endpoints are – they are not accessible from the public internet. However, any process running inside the VM can reach them. They are trying to trick the cloud server
To address this, I returned to the workflow template and updated the External API configuration to use a JPath expression on the r... Cyber Advisors Insecure Cloud Instance Metadata Service (IMDS) Access ...
The detected webhook URL appears to be a potential threat, and it is essential to take immediate action to mitigate any potential risks. By monitoring for suspicious activity, validating webhook configurations, and implementing security measures, you can help protect your Azure environment from potential exploitation. To address this, I returned to the workflow
Run a sidecar proxy (e.g., Webhook Relay or Nginx ) that strictly filters outbound destinations. Never let your application logic resolve DNS or IPs directly.
An attacker is probing you for the cloud equivalent of the nuclear launch codes.