CWE-621
Variable Extraction Error
2007-05-07
00h00 +00:00
00h00 +00:00
특정 CWE 알림
특정 CWE의 변경 사항에 대한 정보를 받아보세요.
이름: Variable Extraction Error
The product uses external input to determine the names of variables into which information is extracted, without verifying that the names of the specified variables are valid.
일반 정보
취약점 도입 방식
Implementation적용 가능한 플랫폼
언어
이름: PHP (Undetermined)클래스: Interpreted (Undetermined)
일반적인 결과
| 범위 | 영향 | 가능성 |
|---|---|---|
| Integrity | Modify Application Data 참고: An attacker could cause the program to overwrite unintended variables. | |
| Integrity | Modify Application Data 참고: When using PHP, calling extract() or import_request_variables() without the proper arguments could allow arbitrary global variables to be overwritten, including superglobals. |
관찰된 예시
| 참고 자료 | 설명 |
|---|---|
CVE-2006-7135 | extract issue enables file inclusion |
CVE-2006-7079 | Chain: PHP app uses extract for register_globals compatibility layer (CWE-621), enabling path traversal (CWE-22) |
CVE-2007-0649 | extract() buried in include files makes post-disclosure analysis confusing; original report had seemed incorrect. |
CVE-2006-6661 | extract() enables static code injection |
CVE-2006-2828 | import_request_variables() buried in include files makes post-disclosure analysis confusing |
잠재적 완화 방법
Phases : ImplementationUse allowlists of variable names that can be extracted.
Phases : Implementation
Consider refactoring your code to avoid extraction routines altogether.
Phases : Implementation
In PHP, call extract() with options such as EXTR_SKIP and EXTR_PREFIX_ALL; call import_request_variables() with a prefix argument. Note that these capabilities are not present in all PHP versions.
취약점 매핑 메모
근거 : This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.댓글 : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
메모
Probably under-reported for PHP. Seems under-studied for other interpreted languages.제출
| 이름 | 조직 | 날짜 | 출시일 | Version |
|---|---|---|---|---|
| CWE Content Team | MITRE | Draft 6 |
수정 사항
| 이름 | 조직 | 날짜 | 댓글 |
|---|---|---|---|
| Eric Dalci | Cigital | updated Time_of_Introduction | |
| CWE Content Team | MITRE | updated Description, Relationships, Observed_Example, Other_Notes, Weakness_Ordinalities | |
| CWE Content Team | MITRE | updated Description | |
| CWE Content Team | MITRE | updated Common_Consequences | |
| CWE Content Team | MITRE | updated Common_Consequences, Demonstrative_Examples, Relationships | |
| CWE Content Team | MITRE | updated Potential_Mitigations | |
| CWE Content Team | MITRE | updated Demonstrative_Examples, Relationships | |
| CWE Content Team | MITRE | updated Description, Other_Notes | |
| CWE Content Team | MITRE | updated Relationships, Taxonomy_Mappings | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Potential_Mitigations | |
| CWE Content Team | MITRE | updated Research_Gaps | |
| CWE Content Team | MITRE | updated Relationships, Type | |
| CWE Content Team | MITRE | updated Mapping_Notes | |
| CWE Content Team | MITRE | updated Observed_Examples | |
| CWE Content Team | MITRE | updated Potential_Mitigations | |
| CWE Content Team | MITRE | updated Applicable_Platforms, Common_Consequences, Demonstrative_Examples, Description |
