CWE-616
Incomplete Identification of Uploaded File Variables (PHP)
2007-05-07
00h00 +00:00
00h00 +00:00
特定のCWEの通知
特定のCWEの変更情報をいち早くお届けします。
名前: 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).
一般情報
導入モード
Implementation適用可能なプラットフォーム
言語
名前： PHP (Undetermined)一般的な結果
| スコープ | 影響 | 可能性 |
|---|---|---|
| Confidentiality Integrity | Read Files or Directories, Modify Files or Directories 注記：These variables could be overwritten by attackers via POST requests, cookies, or other methods, causing the application to read or process unauthorized files. |
観察された例
| 参考文献 | 説明 |
|---|---|
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. |
潜在的な緩和策
Phases : Architecture and DesignUse 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.
脆弱性マッピングノート
理由 : 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.コメント : 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.
参考文献
REF-502
A Study in Scarlet - section 5, "File Upload"Shaun Clowes.
登録情報
| 名前 | 組織 | 日付 | リリース日 | Version |
|---|---|---|---|---|
| PLOVER | Draft 6 |
変更履歴
| 名前 | 組織 | 日付 | コメント |
|---|---|---|---|
| Eric Dalci | Cigital | updated Time_of_Introduction | |
| CWE Content Team | MITRE | updated Relationships, Observed_Example, Other_Notes, Taxonomy_Mappings, Weakness_Ordinalities | |
| CWE Content Team | MITRE | updated Description, Other_Notes, Potential_Mitigations | |
| CWE Content Team | MITRE | updated Other_Notes | |
| CWE Content Team | MITRE | updated Common_Consequences | |
| CWE Content Team | MITRE | updated Observed_Examples, Relationships | |
| CWE Content Team | MITRE | updated Potential_Mitigations | |
| CWE Content Team | MITRE | updated Relationships, Taxonomy_Mappings | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Mapping_Notes | |
| CWE Content Team | MITRE | updated Common_Consequences, Description, Dimensions |
