CWE-925
Improper Verification of Intent by Broadcast Receiver
2013-07-17
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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: Improper Verification of Intent by Broadcast Receiver
The Android application uses a Broadcast Receiver that receives an Intent but does not properly verify that the Intent came from an authorized source.
CWE の説明
Certain types of Intents, identified by action string, can only be broadcast by the operating system itself, not by third-party applications. However, when an application registers to receive these implicit system intents, it is also registered to receive any explicit intents. While a malicious application cannot send an implicit system intent, it can send an explicit intent to the target application, which may assume that any received intent is a valid implicit system intent and not an explicit intent from another application.
一般情報
導入モード
Architecture and Design適用可能なプラットフォーム
言語
クラス： Not Language-Specific (Undetermined)テクノロジー
クラス： Mobile (Undetermined)一般的な結果
| スコープ | 影響 | 可能性 |
|---|---|---|
| Integrity | Gain Privileges or Assume Identity 注記：Another application can impersonate the operating system and cause the software to perform an unintended action. |
観察された例
| 参考文献 | 説明 |
|---|---|
CVE-2025-20972 | Mobile app store does not properly verify the intent by the broadcast receiver, allowing local attackers to write arbitrary files |
CVE-2024-10576 | Mobile device has an application that exposes a broadcast received that allows local attackers to force a factory reset |
潜在的な緩和策
Phases : Architecture and DesignBefore acting on the Intent, check the Intent Action to make sure it matches the expected System action.
検出方法
Automated Static Analysis
Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)有効性 : High
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.
関連する攻撃パターン
| CAPEC ID | 攻撃パターン名 |
|---|---|
| CAPEC-499 | Android Intent Intercept
An adversary, through a previously installed malicious application, intercepts messages from a trusted Android-based application in an attempt to achieve a variety of different objectives including denial of service, information disclosure, and data injection. An implicit intent sent from a trusted application can be received by any application that has declared an appropriate intent filter. If the intent is not protected by a permission that the malicious application lacks, then the attacker can gain access to the data contained within the intent. Further, the intent can be either blocked from reaching the intended destination, or modified and potentially forwarded along. |
ノート
This entry will be made more comprehensive in later CWE versions.参考文献
REF-922
Analyzing Inter-Application Communication in AndroidErika Chin, Adrienne Porter Felt, Kate Greenwood, David Wagner.
http://www.eecs.berkeley.edu/~daw/papers/intents-mobisys11.pdf
登録情報
| 名前 | 組織 | 日付 | リリース日 | Version |
|---|---|---|---|---|
| CWE Content Team | MITRE | 2.5 |
変更履歴
| 名前 | 組織 | 日付 | コメント |
|---|---|---|---|
| CWE Content Team | MITRE | updated Alternate_Terms, Demonstrative_Examples, Description, References | |
| CWE Content Team | MITRE | updated Demonstrative_Examples | |
| CWE Content Team | MITRE | updated Related_Attack_Patterns | |
| CWE Content Team | MITRE | updated Applicable_Platforms, Relationships | |
| CWE Content Team | MITRE | updated Relationships | |
| CWE Content Team | MITRE | updated Detection_Factors, Relationships | |
| CWE Content Team | MITRE | updated Mapping_Notes | |
| CWE Content Team | MITRE | updated Weakness_Ordinalities | |
| CWE Content Team | MITRE | updated Observed_Examples | |
| CWE Content Team | MITRE | updated Description |
