CWE-689
Permission Race Condition During Resource Copy
2008-04-11
00h00 +00:00
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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: Permission Race Condition During Resource Copy
The product, while copying or cloning a resource, does not set the resource's permissions or access control until the copy is complete, leaving the resource exposed to other spheres while the copy is taking place.
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： C (Undetermined)名前： Perl (Undetermined)
一般的な結果
| スコープ | 影響 | 可能性 |
|---|---|---|
| Confidentiality Integrity | Read Application Data, Modify Application Data |
観察された例
| 参考文献 | 説明 |
|---|---|
CVE-2002-0760 | Archive extractor decompresses files with world-readable permissions, then later sets permissions to what the archive specified. |
CVE-2005-2174 | Product inserts a new object into database before setting the object's permissions, introducing a race condition. |
CVE-2006-5214 | Error file has weak permissions before a chmod is performed. |
CVE-2005-2475 | Archive permissions issue using hard link. |
CVE-2003-0265 | Database product creates files world-writable before initializing the setuid bits, leading to modification of executables. |
脆弱性マッピングノート
理由 : This is a Composite of multiple weaknesses that must all occur simultaneously.コメント : While composites are supported in CWE, they have not been a focus of research. There is a chance that future research or CWE scope clarifications will change or deprecate them. Perform root-cause analysis to determine which weaknesses allow this issue to occur, and map to those weaknesses. For example, the delayed permission-setting in the resource copy might be intended functionality, but creation in a location with insecure permissions might not.
関連する攻撃パターン
| CAPEC ID | 攻撃パターン名 |
|---|---|
| CAPEC-26 | Leveraging Race Conditions
The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file. |
| CAPEC-27 | Leveraging Race Conditions via Symbolic Links
This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file. |
ノート
Under-studied. It seems likely that this weakness could occur in any situation in which a complex or large copy operation occurs, when the resource can be made available to other spheres as soon as it is created, but before its initialization is complete.参考文献
REF-62
The Art of Software Security AssessmentMark Dowd, John McDonald, Justin Schuh.
登録情報
| 名前 | 組織 | 日付 | リリース日 | Version |
|---|---|---|---|---|
| CWE Content Team | MITRE | Draft 9 |
変更履歴
| 名前 | 組織 | 日付 | コメント |
|---|---|---|---|
| CWE Content Team | MITRE | updated Applicable_Platforms, Relationships, Other_Notes, Weakness_Ordinalities | |
| CWE Content Team | MITRE | updated Related_Attack_Patterns | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Common_Consequences | |
| CWE Content Team | MITRE | updated References | |
| CWE Content Team | MITRE | updated Modes_of_Introduction, Other_Notes | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Mapping_Notes |
