CWE-626 - Null Byte Interaction Error (Poison Null Byte)
- 摘要：Variant
- 结构：Simple
- 状态：Draft
- 发布日期：2007-05-07
- 更新日期：2025-12-11
名称
Null Byte Interaction Error (Poison Null Byte)
描述
The product does not properly handle null bytes or NUL characters when passing data between different representations or components.
A null byte (NUL character) can have different meanings across representations or languages. For example, it is a string terminator in standard C libraries, but Perl and PHP strings do not treat it as a terminator. When two representations are crossed - such as when Perl or PHP invokes underlying C functionality - this can produce an interaction error with unexpected results. Similar issues have been reported for ASP. Other interpreters written in C might also be affected. The poison null byte is frequently useful in path traversal attacks by terminating hard-coded extensions that are added to a filename. It can play a role in regular expression processing in PHP.
常见后果
范围：Integrity
影响：Unexpected State