Injection Protection: XPath extended injection - Plugin

XPath extended injectionv3.9+

Detects intentionally malformed information that is sent to a website with the intention of constructing an XPath query for XML data, specifically in the full syntax. Uses the following regex for matching: /?(ancestor(-or-self)?|descendant(-or-self)?|following(-sibling))’

Set up the plugin

Add this section to your declarative configuration file:

_format_version: "3.0"
plugins:
  - name: injection-protection
    config:
      injection_types:
      - xpath_extended
      locations:
      - path_and_query
      enforcement_mode: block
      error_status_code: 400
      error_message: Bad Request

Make the following request:

curl -i -X POST http://localhost:8001/plugins/ \
    --header "Accept: application/json" \
    --header "Content-Type: application/json" \
    --data '
    {
      "name": "injection-protection",
      "config": {
        "injection_types": [
          "xpath_extended"
        ],
        "locations": [
          "path_and_query"
        ],
        "enforcement_mode": "block",
        "error_status_code": 400,
        "error_message": "Bad Request"
      }
    }
    '

Make the following request:

curl -X POST https://{region}.api.konghq.com/v2/control-planes/{controlPlaneId}/core-entities/plugins/ \
    --header "accept: application/json" \
    --header "Content-Type: application/json" \
    --header "Authorization: Bearer $KONNECT_TOKEN" \
    --data '
    {
      "name": "injection-protection",
      "config": {
        "injection_types": [
          "xpath_extended"
        ],
        "locations": [
          "path_and_query"
        ],
        "enforcement_mode": "block",
        "error_status_code": 400,
        "error_message": "Bad Request"
      }
    }
    '

Make sure to replace the following placeholders with your own values:

region: Geographic region where your Kong Konnect is hosted and operates.
controlPlaneId: The id of the control plane.
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account.

See the Konnect API reference to learn about region-specific URLs and personal access tokens.

echo "
apiVersion: configuration.konghq.com/v1
kind: KongClusterPlugin
metadata:
  name: injection-protection
  namespace: kong
  annotations:
    kubernetes.io/ingress.class: kong
  labels:
    global: 'true'
config:
  injection_types:
  - xpath_extended
  locations:
  - path_and_query
  enforcement_mode: block
  error_status_code: 400
  error_message: Bad Request
plugin: injection-protection
" | kubectl apply -f -

Prerequisite: Configure your Personal Access Token

terraform {
  required_providers {
    konnect = {
      source  = "kong/konnect"
    }
  }
}

provider "konnect" {
  personal_access_token = "$KONNECT_TOKEN"
  server_url            = "https://us.api.konghq.com/"
}

Add the following to your Terraform configuration to create a Konnect Gateway Plugin:

resource "konnect_gateway_plugin_injection_protection" "my_injection_protection" {
  enabled = true

  config = {
    injection_types = ["xpath_extended"]
    locations = ["path_and_query"]
    enforcement_mode = "block"
    error_status_code = 400
    error_message = "Bad Request"
  }

  control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
}

Add this section to your declarative configuration file:

_format_version: "3.0"
plugins:
  - name: injection-protection
    service: serviceName|Id
    config:
      injection_types:
      - xpath_extended
      locations:
      - path_and_query
      enforcement_mode: block
      error_status_code: 400
      error_message: Bad Request

Make sure to replace the following placeholders with your own values:

serviceName|Id: The id or name of the service the plugin configuration will target.

Make the following request:

curl -i -X POST http://localhost:8001/services/{serviceName|Id}/plugins/ \
    --header "Accept: application/json" \
    --header "Content-Type: application/json" \
    --data '
    {
      "name": "injection-protection",
      "config": {
        "injection_types": [
          "xpath_extended"
        ],
        "locations": [
          "path_and_query"
        ],
        "enforcement_mode": "block",
        "error_status_code": 400,
        "error_message": "Bad Request"
      }
    }
    '

Make sure to replace the following placeholders with your own values:

serviceName|Id: The id or name of the service the plugin configuration will target.

Make the following request:

curl -X POST https://{region}.api.konghq.com/v2/control-planes/{controlPlaneId}/core-entities/services/{serviceId}/plugins/ \
    --header "accept: application/json" \
    --header "Content-Type: application/json" \
    --header "Authorization: Bearer $KONNECT_TOKEN" \
    --data '
    {
      "name": "injection-protection",
      "config": {
        "injection_types": [
          "xpath_extended"
        ],
        "locations": [
          "path_and_query"
        ],
        "enforcement_mode": "block",
        "error_status_code": 400,
        "error_message": "Bad Request"
      }
    }
    '

Make sure to replace the following placeholders with your own values:

region: Geographic region where your Kong Konnect is hosted and operates.
controlPlaneId: The id of the control plane.
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account.
serviceId: The id of the service the plugin configuration will target.

See the Konnect API reference to learn about region-specific URLs and personal access tokens.

echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
  name: injection-protection
  namespace: kong
  annotations:
    kubernetes.io/ingress.class: kong
config:
  injection_types:
  - xpath_extended
  locations:
  - path_and_query
  enforcement_mode: block
  error_status_code: 400
  error_message: Bad Request
plugin: injection-protection
" | kubectl apply -f -

Next, apply the KongPlugin resource by annotating the service resource:

kubectl annotate -n kong service SERVICE_NAME konghq.com/plugins=injection-protection

Prerequisite: Configure your Personal Access Token

terraform {
  required_providers {
    konnect = {
      source  = "kong/konnect"
    }
  }
}

provider "konnect" {
  personal_access_token = "$KONNECT_TOKEN"
  server_url            = "https://us.api.konghq.com/"
}

Add the following to your Terraform configuration to create a Konnect Gateway Plugin:

resource "konnect_gateway_plugin_injection_protection" "my_injection_protection" {
  enabled = true

  config = {
    injection_types = ["xpath_extended"]
    locations = ["path_and_query"]
    enforcement_mode = "block"
    error_status_code = 400
    error_message = "Bad Request"
  }

  control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
  service = {
    id = konnect_gateway_service.my_service.id
  }
}

Add this section to your declarative configuration file:

_format_version: "3.0"
plugins:
  - name: injection-protection
    route: routeName|Id
    config:
      injection_types:
      - xpath_extended
      locations:
      - path_and_query
      enforcement_mode: block
      error_status_code: 400
      error_message: Bad Request

Make sure to replace the following placeholders with your own values:

routeName|Id: The id or name of the route the plugin configuration will target.

Make the following request:

curl -i -X POST http://localhost:8001/routes/{routeName|Id}/plugins/ \
    --header "Accept: application/json" \
    --header "Content-Type: application/json" \
    --data '
    {
      "name": "injection-protection",
      "config": {
        "injection_types": [
          "xpath_extended"
        ],
        "locations": [
          "path_and_query"
        ],
        "enforcement_mode": "block",
        "error_status_code": 400,
        "error_message": "Bad Request"
      }
    }
    '

Make sure to replace the following placeholders with your own values:

routeName|Id: The id or name of the route the plugin configuration will target.

Make the following request:

curl -X POST https://{region}.api.konghq.com/v2/control-planes/{controlPlaneId}/core-entities/routes/{routeId}/plugins/ \
    --header "accept: application/json" \
    --header "Content-Type: application/json" \
    --header "Authorization: Bearer $KONNECT_TOKEN" \
    --data '
    {
      "name": "injection-protection",
      "config": {
        "injection_types": [
          "xpath_extended"
        ],
        "locations": [
          "path_and_query"
        ],
        "enforcement_mode": "block",
        "error_status_code": 400,
        "error_message": "Bad Request"
      }
    }
    '

Make sure to replace the following placeholders with your own values:

region: Geographic region where your Kong Konnect is hosted and operates.
controlPlaneId: The id of the control plane.
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account.
routeId: The id of the route the plugin configuration will target.

See the Konnect API reference to learn about region-specific URLs and personal access tokens.

echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
  name: injection-protection
  namespace: kong
  annotations:
    kubernetes.io/ingress.class: kong
config:
  injection_types:
  - xpath_extended
  locations:
  - path_and_query
  enforcement_mode: block
  error_status_code: 400
  error_message: Bad Request
plugin: injection-protection
" | kubectl apply -f -

Next, apply the KongPlugin resource by annotating the httproute or ingress resource:

kubectl annotate -n kong httproute  konghq.com/plugins=injection-protection

kubectl annotate -n kong ingress  konghq.com/plugins=injection-protection

Prerequisite: Configure your Personal Access Token

terraform {
  required_providers {
    konnect = {
      source  = "kong/konnect"
    }
  }
}

provider "konnect" {
  personal_access_token = "$KONNECT_TOKEN"
  server_url            = "https://us.api.konghq.com/"
}

Add the following to your Terraform configuration to create a Konnect Gateway Plugin:

resource "konnect_gateway_plugin_injection_protection" "my_injection_protection" {
  enabled = true

  config = {
    injection_types = ["xpath_extended"]
    locations = ["path_and_query"]
    enforcement_mode = "block"
    error_status_code = 400
    error_message = "Bad Request"
  }

  control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
  route = {
    id = konnect_gateway_route.my_route.id
  }
}

Injection Protection

XPath extended injectionv3.9+

Set up the plugin

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