CWE-825—Expired Pointer Dereference
PUBLISHEDweakness record
released 2010-09-27 · last modified 2025-12-11
Metadata
- CWE ID：
- CWE-825
- 摘要：
- Base
- 结构：
- Simple
- 状态：
- Incomplete
- 发布日期：
- 2010-09-27
- 更新日期：
- 2025-12-11
名称
Expired Pointer Dereference
描述
The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.
When a product releases memory, but it maintains a pointer to that memory, then the memory might be re-allocated at a later time. If the original pointer is accessed to read or write data, then this could cause the product to read or modify data that is in use by a different function or process. Depending on how the newly-allocated memory is used, this could lead to a denial of service, information exposure, or code execution.
常见后果
- 范围：
- Confidentiality
- 影响：
- Read Memory
- 注释：
- If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.
- 范围：
- Availability
- 影响：
- DoS: Crash, Exit, or Restart
- 注释：
- If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
- 范围：
- Integrity, Confidentiality, Availability
- 影响：
- Execute Unauthorized Code or Commands
- 注释：
- If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.