CWE-1336 詳細

The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

背景の詳細

導入モード

Architecture and Design : The developer might choose a template engine that makes it easier for programmers to write vulnerable code.
Implementation : The programmer might not use engine's built-in sandboxes or other capabilities to escape or otherwise prevent template injection from untrusted input.

適用可能なプラットフォーム

言語

名前： Java (Undetermined)
名前： PHP (Undetermined)
名前： Python (Undetermined)
名前： JavaScript (Undetermined)
クラス： Interpreted (Undetermined)

オペレーティングシステム

クラス： Not OS-Specific (Undetermined)

テクノロジー

クラス： Not Technology-Specific (Undetermined)
名前： AI/ML (Undetermined)
クラス： Client Server (Undetermined)

一般的な結果

観察された例

潜在的な緩和策

Phases : Architecture and Design
Choose a template engine that offers a sandbox or restricted mode, or at least limits the power of any available expressions, function calls, or commands.
Phases : Implementation
Use the template engine's sandbox or restricted mode, if available.

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 Base 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.

ノート

Since expression languages are often used in templating languages, there may be some overlap with CWE-917 (Expression Language Injection). XSS (CWE-79) is also co-located with template injection.
The interrelationships and differences between CWE-917 and CWE-1336 need to be further clarified.

参考文献

REF-1193

Server-Side Template Injection
James Kettle.
https://portswigger.net/research/server-side-template-injection

REF-1194

Server-Side Template Injection: RCE For The Modern Web App
James Kettle.
https://www.youtube.com/watch?v=3cT0uE7Y87s

登録情報

変更履歴