CWE-827: Improper Control of Document Type Definition
CWE版本: 4.18
更新日期: 2025-09-09
弱点描述
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.
常见后果
影响范围: Confidentiality
技术影响: Read Files or Directories
说明: If the attacker is able to include a crafted DTD and a default entity resolver is enabled, the attacker may be able to access arbitrary files on the system.
影响范围: Availability
技术影响: DoS: Resource Consumption (CPU) DoS: Resource Consumption (Memory)
说明: The DTD may cause the parser to consume excessive CPU cycles or memory using techniques such as nested or recursive entity references (CWE-776).
影响范围: Integrity Confidentiality Availability Access Control
技术影响: Execute Unauthorized Code or Commands Gain Privileges or Assume Identity
说明: The DTD may include arbitrary HTTP requests that the server may execute. This could lead to other attacks leveraging the server's trust relationship with other entities.
观察示例
参考: CVE-2010-2076
Product does not properly reject DTDs in SOAP messages, which allows remote attackers to read arbitrary files, send HTTP requests to intranet servers, or cause a denial of service.
引入模式
| 阶段 | 说明 |
|---|---|
| Implementation | REALIZATION: This weakness is caused during implementation of an architectural security tactic. |