Undefined Scope 'securityScheme' On Global 'security' Field
- Query id: 23a9e2d9-8738-4556-a71c-2802b6ffa022
- Query name: Undefined Scope 'securityScheme' On Global 'security' Field
- Platform: OpenAPI
- Severity: Low
- Category: Access Control
- CWE: 284
- URL: Github
Description¶
Using a scope on global security field that is undefined on 'securityScheme' can be defined by an attacker
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Positive test num. 1 - json file
{
"openapi": "3.0.0",
"info": {
"title": "Simple API overview",
"version": "1.0.0"
},
"paths": {
"/": {
"get": {
"operationId": "listVersionsv2",
"summary": "List API versions",
"responses": {
"200": {
"description": "200 response",
"content": {
"application/json": null
}
}
}
}
}
},
"security": {
"oAuth2AuthCodeNeg2": [
"read:api",
"error:api"
]
},
"components": {
"securitySchemes": {
"oAuth2AuthCodeNeg2": {
"type": "oauth2",
"description": "For more information, see https://api.my.company.com/docs/oauth",
"flows": {
"authorizationCode": {
"authorizationUrl": "https://api.my.company.com/oauth/authorize",
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"read:api": "read your apis",
"admin:api": "admin scope"
}
},
"password": {
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"write:api": "write your apis"
}
}
}
}
}
}
}
Positive test num. 2 - json file
{
"openapi": "3.0.0",
"info": {
"title": "Simple API overview",
"version": "1.0.0"
},
"paths": {
"/": {
"get": {
"operationId": "listVersionsv2",
"summary": "List API versions",
"responses": {
"200": {
"description": "200 response",
"content": {
"application/json": null
}
}
}
}
}
},
"security": [
{
"oAuth2AuthCodeNeg2": [
"error:api",
"write:api"
]
}
],
"components": {
"securitySchemes": {
"oAuth2AuthCodeNeg2": {
"type": "oauth2",
"description": "For more information, see https://api.my.company.com/docs/oauth",
"flows": {
"authorizationCode": {
"authorizationUrl": "https://api.my.company.com/oauth/authorize",
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"read:api": "read your apis",
"admin:api": "admin scope"
}
},
"password": {
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"write:api": "write your apis"
}
}
}
}
}
}
}
Positive test num. 3 - yaml file
openapi: 3.0.0
info:
title: Simple API overview
version: 1.0.0
paths:
"/":
get:
operationId: listVersionsv2
summary: List API versions
responses:
'200':
description: 200 response
content:
application/json:
security:
oAuth2AuthCodeNeg2:
- read:api
- error:api
components:
securitySchemes:
oAuth2AuthCodeNeg2:
type: oauth2
description: For more information, see https://api.my.company.com/docs/oauth
flows:
authorizationCode:
authorizationUrl: https://api.my.company.com/oauth/authorize
tokenUrl: https://api.my.company.com/oauth/token
scopes:
read:api: read your apis
admin:api: admin scope
password:
tokenUrl: https://api.my.company.com/oauth/token
scopes:
write:api: write your apis
Positive test num. 4 - yaml file
openapi: 3.0.0
info:
title: Simple API overview
version: 1.0.0
paths:
"/":
get:
operationId: listVersionsv2
summary: List API versions
responses:
'200':
description: 200 response
content:
application/json:
security:
- oAuth2AuthCodeNeg2:
- error:api
- write:api
components:
securitySchemes:
oAuth2AuthCodeNeg2:
type: oauth2
description: For more information, see https://api.my.company.com/docs/oauth
flows:
authorizationCode:
authorizationUrl: https://api.my.company.com/oauth/authorize
tokenUrl: https://api.my.company.com/oauth/token
scopes:
read:api: read your apis
admin:api: admin scope
password:
tokenUrl: https://api.my.company.com/oauth/token
scopes:
write:api: write your apis
Code samples without security vulnerabilities¶
Negative test num. 1 - json file
{
"openapi": "3.0.0",
"info": {
"title": "Simple API overview",
"version": "1.0.0"
},
"paths": {
"/": {
"get": {
"operationId": "listVersionsv2",
"summary": "List API versions",
"responses": {
"200": {
"description": "200 response",
"content": {
"application/json": null
}
}
}
}
}
},
"security": [
{
"oAuth2AuthCodeNeg2": [
"read:api",
"write:api"
]
}
],
"components": {
"securitySchemes": {
"oAuth2AuthCodeNeg2": {
"type": "oauth2",
"description": "For more information, see https://api.my.company.com/docs/oauth",
"flows": {
"authorizationCode": {
"authorizationUrl": "https://api.my.company.com/oauth/authorize",
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"read:api": "read your apis",
"admin:api": "admin scope"
}
},
"password": {
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"write:api": "write your apis"
}
}
}
}
}
}
}
Negative test num. 2 - json file
{
"openapi": "3.0.0",
"info": {
"title": "Simple API overview",
"version": "1.0.0"
},
"paths": {
"/": {
"get": {
"operationId": "listVersionsv2",
"summary": "List API versions",
"responses": {
"200": {
"description": "200 response",
"content": {
"application/json": null
}
}
}
}
}
},
"security": {
"oAuth2AuthCodeNeg2": [
"read:api",
"write:api"
]
},
"components": {
"securitySchemes": {
"oAuth2AuthCodeNeg2": {
"type": "oauth2",
"description": "For more information, see https://api.my.company.com/docs/oauth",
"flows": {
"authorizationCode": {
"authorizationUrl": "https://api.my.company.com/oauth/authorize",
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"read:api": "read your apis",
"admin:api": "admin scope"
}
},
"password": {
"tokenUrl": "https://api.my.company.com/oauth/token",
"scopes": {
"write:api": "write your apis"
}
}
}
}
}
}
}
Negative test num. 3 - yaml file
openapi: 3.0.0
info:
title: Simple API overview
version: 1.0.0
paths:
"/":
get:
operationId: listVersionsv2
summary: List API versions
responses:
'200':
description: 200 response
content:
application/json:
security:
- oAuth2AuthCodeNeg2:
- read:api
- write:api
components:
securitySchemes:
oAuth2AuthCodeNeg2:
type: oauth2
description: For more information, see https://api.my.company.com/docs/oauth
flows:
authorizationCode:
authorizationUrl: https://api.my.company.com/oauth/authorize
tokenUrl: https://api.my.company.com/oauth/token
scopes:
read:api: read your apis
admin:api: admin scope
password:
tokenUrl: https://api.my.company.com/oauth/token
scopes:
write:api: write your apis
Negative test num. 4 - yaml file
openapi: 3.0.0
info:
title: Simple API overview
version: 1.0.0
paths:
"/":
get:
operationId: listVersionsv2
summary: List API versions
responses:
'200':
description: 200 response
content:
application/json:
security:
oAuth2AuthCodeNeg2:
- read:api
- write:api
components:
securitySchemes:
oAuth2AuthCodeNeg2:
type: oauth2
description: For more information, see https://api.my.company.com/docs/oauth
flows:
authorizationCode:
authorizationUrl: https://api.my.company.com/oauth/authorize
tokenUrl: https://api.my.company.com/oauth/token
scopes:
read:api: read your apis
admin:api: admin scope
password:
tokenUrl: https://api.my.company.com/oauth/token
scopes:
write:api: write your apis