CWE-690 - Unchecked Return Value to NULL Pointer Dereference
- 摘要：Compound
- 结构：Chain
- 状态：Draft
- 发布日期：2008-04-11
- 更新日期：2025-12-11
名称
Unchecked Return Value to NULL Pointer Dereference
描述
The product does not check for an error after calling a function that can return with a NULL pointer if the function fails, which leads to a resultant NULL pointer dereference.
While unchecked return value weaknesses are not limited to returns of NULL pointers (see the examples in CWE-252), functions often return NULL to indicate an error status. When this error condition is not checked, a NULL pointer dereference can occur.
常见后果
范围：Availability
影响：DoS: Crash, Exit, or Restart
范围：Integrity, Confidentiality, Availability
影响：Execute Unauthorized Code or Commands, Read Memory, Modify Memory
注释：In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution.