GCP - App Engine Post Exploitation

Tip

Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)
Learn & practice Az Hacking: HackTricks Training Azure Red Team Expert (AzRTE)

Support HackTricks

• Check the subscription plans!
• Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
• Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.

App Engine

For information about App Engine check:

GCP - App Engine Enum

appengine.memcache.addKey | appengine.memcache.list | appengine.memcache.getKey | appengine.memcache.flush

With these permissions it’s possible to:

• Add a key
• List keys
• Get a key
• Delete

Caution

However, I couldn’t find any way to access this information from the cli, only from the web console where you need to know the Key type and the Key name, of from the app engine running app.

If you know easier ways to use these permissions send a Pull Request!

logging.views.access

With this permission it’s possible to see the logs of the App:

gcloud app logs tail -s <name>

Service and version deletion

The appengine.versions.delete, appengine.versions.list, and appengine.services.list permissions allow managing and deleting specific versions of an App Engine application, which can affect traffic if it is split or if the only stable version is removed. Meanwhile, the appengine.services.delete and appengine.services.list permissions allow listing and deleting entire services—an action that immediately disrupts all traffic and the availability of the associated versions.

gcloud app versions delete <VERSION_ID>
gcloud app services delete <SERVICE_NAME>

Read Source Code

The source code of all the versions and services are stored in the bucket with the name staging.<proj-id>.appspot.com. If you have write access over it you can read the source code and search for vulnerabilities and sensitive information.

Modify Source Code

Modify source code to steal credentials if they are being sent or perform a defacement web attack.

Tip

Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)
Learn & practice Az Hacking: HackTricks Training Azure Red Team Expert (AzRTE)

Support HackTricks

• Check the subscription plans!
• Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
• Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.