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CWE-651 Individual Dictionary Definition (Draft 9)
Weakness ID
| Status: Incomplete 651 (Weakness Variant) | | Description | Summary Web services architecture may require exposing a WSDL file that contains information on the publicly accessible services
and how callers of these services should interact with them (e.g. what parameters they expect and what types they return).
An information disclosure leak may occur if:
1. WSDL file is accessible to a wider audience that intended
2. WSDL file contains information on the methods/services that should not be publicly accessible or information about deprecated methods
This problem is made more likely due to the WSDL often being automatically generated from the code
3. Information in WSDL file helps guess names/locations of methods/resources that should not be publicly accessible | | Likelihood of Exploit | | | Common Consequences | Information Disclosure | | Enabling Factors for Exploitation |
The system employs a web services architecture.
WSDL is used to advertise information information on how to communicate with the service.
| | Potential Mitigations |
Limit access to the WSDL file as much as possible. If services are provided only to a limited number of entities, it may be better
to provide WSDL privately to each of these entities than to publish WSDL publicly.
Make sure that WSDL does not describe methods that should not be publicly accessible. Make sure to protect
service methods that should not be publicly accessible with access controls.
Do not use method names in WSDL that might help an adversary guess names of private methods/resources used by the service.
| | Observed Examples | | Reference | Description |
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| The WSDL for a service providing information on the best price of a certain item exposes the following method: float getBestPrice(String ItemID)
An attacker might guess that there is a method setBestPrice (String ItemID, float Price) that is available and invoke that method to try and
change the best price of a given item to their advantage. The attack may succeed if the attacker correctly guesses the name of the method, the method
does not have proper access controls around it and the service itself has the functionality to update the best price of the item. |
| | Relationships | | | Applicable Platforms | All | | Time of Introduction | Architecture and Design Implementation System Configuration |
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- Weakness
- Base
- Variant
- Class
- Chain
- Composite
- Category
- View
- Deprecated
