CAPEC-201
Serialized Data External Linking
2014-06-23
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特定のCAPECのアラート
特定のCAPECの変更情報をいち早くお届けします。
CAPEC の説明
An adversary creates a serialized data file (e.g. XML, YAML, etc...) that contains an external data reference. Because serialized data parsers may not validate documents with external references, there may be no checks on the nature of the reference in the external data. This can allow an adversary to open arbitrary files or connections, which may further lead to the adversary gaining access to information on the system that they would normally be unable to obtain.
CAPEC の情報
実行フロー
1) Explore
[Survey the target] Using a browser or an automated tool, an adversary records all instances of web services that process requests with serialized data.
技法
- Use an automated tool to record all instances of URLs that process requests with serialized data.
- Use a browser to manually explore the website and analyze how the application processes serialized data requests.
2) Exploit
[Craft malicious payload] The adversary crafts malicious data message that contains references to sensitive files.
3) Exploit
[Launch an External Linking attack] Send the malicious crafted message containing the reference to a sensitive file to the target URL.
前提条件
The target must follow external data references without validating the validity of the reference target.必要なスキル
To send serialized data messages with maliciously crafted schema.必要なリソース
None: No specialized resources are required to execute this type of attack.緩和策
Configure the serialized data processor to only retrieve external entities from trusted sources.関連する弱点
| 弱点名 | |
|---|---|
CWE-829 |
Inclusion of Functionality from Untrusted Control Sphere The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. |
参考文献
REF-73
XXE (Xml eXternal Entity) Attackhttp://www.securiteam.com/securitynews/6D0100A5PU.html
REF-74
CESA-2007-002 - rev 2: Sun JDK6 breaks XXE attack protectionhttp://scary.beasts.org/security/CESA-2007-002.html
登録情報
| 名前 | 組織 | 日付 | リリース日 |
|---|---|---|---|
| CAPEC Content Team | The MITRE Corporation |
変更履歴
| 名前 | 組織 | 日付 | コメント |
|---|---|---|---|
| CAPEC Content Team | The MITRE Corporation | Updated Activation_Zone, Attack_Phases, Attacker_Skills_or_Knowledge_Required, Description, Description Summary, Examples-Instances, Injection_Vector, Methods_of_Attack, Payload, Payload_Activation_Impact, Resources_Required, Typical_Likelihood_of_Exploit, Typical_Severity | |
| CAPEC Content Team | The MITRE Corporation | Updated Attack_Phases, Description Summary, Related_Attack_Patterns, Related_Weaknesses | |
| CAPEC Content Team | The MITRE Corporation | Updated @Name, Description, Execution_Flow, Mitigations, Skills_Required | |
| CAPEC Content Team | The MITRE Corporation | Updated Consequences, Description | |
| CAPEC Content Team | The MITRE Corporation | Updated Description, Example_Instances, Execution_Flow, Prerequisites | |
| CAPEC Content Team | The MITRE Corporation | Updated Example_Instances, Related_Attack_Patterns |
