CWE-827: Improper Control of Document Type Definition
ID
CWE-827
Abstraction
Variant
Structure
Simple
Status
Incomplete
The product does not restrict a reference to a Document Type Definition (DTD) to the intended control sphere. This might allow attackers to reference arbitrary DTDs, possibly causing the product to expose files, consume excessive system resources, or execute arbitrary http requests on behalf of the attacker.
As DTDs are processed, they might try to read or include files on the machine performing the parsing. If an attacker is able to control the DTD, then the attacker might be able to specify sensitive resources or requests or provide malicious content.
For example, the SOAP specification prohibits SOAP messages from containing DTDs.
Modes of Introduction
| Phase | Note |
|---|---|
| Implementation | REALIZATION: This weakness is caused during implementation of an architectural security tactic. |
Applicable Platforms
| Type | Class | Name | Prevalence |
|---|---|---|---|
| Language | XML |
Relationships
| View | Weakness | |||||||
|---|---|---|---|---|---|---|---|---|
| # ID | View | Status | # ID | Name | Abstraction | Structure | Status | |
| CWE-1000 | Research Concepts | Draft | CWE-706 | Use of Incorrectly-Resolved Name or Reference | Class | Simple | Incomplete | |
| CWE-1000 | Research Concepts | Draft | CWE-829 | Inclusion of Functionality from Untrusted Control Sphere | Base | Simple | Incomplete | |
| CWE-1000 | Research Concepts | Draft | CWE-776 | Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') | Base | Simple | Draft | |
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