名稱: 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.
一般資訊
引入方式
Implementation適用平台
程式語言
名稱： PHP (Undetermined)類別： Interpreted (Undetermined)
常見後果
| 範圍 | 影響 | 可能性 |
|---|---|---|
| Integrity | Modify Application Data 注意：An attacker could cause the program to overwrite unintended variables. | |
| Integrity | Modify Application Data 注意：When using PHP, calling extract() or import_request_variables() without the proper arguments could allow arbitrary global variables to be overwritten, including superglobals. |
觀察到的案例
| 參考資料 | 描述 |
|---|---|
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 |
潛在緩解措施
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.
漏洞對應備注
理由說明 : 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.備註 : 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.
備注
Probably under-reported for PHP. Seems under-studied for other interpreted languages.提交
| 名稱 | 機構 | 日期 | 發布日期 | Version |
|---|---|---|---|---|
| CWE Content Team | MITRE | Draft 6 |
修改記錄
| 名稱 | 機構 | 日期 | 備註 |
|---|---|---|---|
| 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 |
