名稱: Incomplete Identification of Uploaded File Variables (PHP)

The PHP application uses an old method for processing uploaded files by referencing the four global variables that are set for each file (e.g. $varname, $varname_size, $varname_name, $varname_type).

一般資訊

引入方式

Implementation

適用平台

程式語言

名稱： PHP (Undetermined)

常見後果

範圍	影響	可能性
Confidentiality Integrity	Read Files or Directories, Modify Files or Directories 注意：These variables could be overwritten by attackers via POST requests, cookies, or other methods, causing the application to read or process unauthorized files.

觀察到的案例

參考資料	描述
CVE-2002-1460	Forum does not properly verify whether a file was uploaded or if the associated variables were set by POST, allowing remote attackers to read arbitrary files.
CVE-2002-1759	Product doesn't check if the variables for an upload were set by uploading the file, or other methods such as $_POST.
CVE-2002-1710	Product does not distinguish uploaded file from other files.

潛在緩解措施

Phases : Architecture and Design
Use PHP 4 or later.
Phases : Architecture and Design
If you must support older PHP versions, write your own version of is_uploaded_file() and run it against $HTTP_POST_FILES['userfile']))
Phases : Implementation
For later PHP versions, reference uploaded files using the $HTTP_POST_FILES or $_FILES variables, and use is_uploaded_file() or move_uploaded_file() to ensure that you are dealing with an uploaded file.

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.

參考資料

REF-502

A Study in Scarlet - section 5, "File Upload"
Shaun Clowes.

提交

名稱	機構	日期	發布日期	Version
PLOVER		2007-05-07 +00:00	2007-05-07 +00:00	Draft 6

修改記錄

名稱	機構	日期	備註
Eric Dalci	Cigital	2008-07-01 +00:00	updated Time_of_Introduction
CWE Content Team	MITRE	2008-09-08 +00:00	updated Relationships, Observed_Example, Other_Notes, Taxonomy_Mappings, Weakness_Ordinalities
CWE Content Team	MITRE	2008-10-14 +00:00	updated Description, Other_Notes, Potential_Mitigations
CWE Content Team	MITRE	2011-03-29 +00:00	updated Other_Notes
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2012-05-11 +00:00	updated Observed_Examples, Relationships
CWE Content Team	MITRE	2012-10-30 +00:00	updated Potential_Mitigations
CWE Content Team	MITRE	2014-07-30 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2020-02-24 +00:00	updated Relationships
CWE Content Team	MITRE	2023-04-27 +00:00	updated Relationships
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2026-10-28 +00:00	updated Common_Consequences, Description, Dimensions

CWE-616 詳細資料

CWE-616