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GPCE
2007
Springer

Preventing injection attacks with syntax embeddings

13 years 10 months ago
Preventing injection attacks with syntax embeddings
Software written in one language often needs to construct sentences in another language, such as SQL queries, XML output, or shell command invocations. This is almost always done using unhygienic string manipulation, the concatenation of constants and client-supplied strings. A client can then supply specially crafted input that causes the constructed sentence to be interpreted in an unintended way, leading to an injection attack. We describe a more natural style of programming that yields code that is impervious to injections by construction. Our approach embeds the grammars of the guest languages (e.g., SQL) into that of the host language (e.g., Java) and automatically generates code that maps the embedded language to constructs in the host language that reconstruct the embedded sentences, adding escaping functions where appropriate. This approach is generic, meaning that it can be applied with relative ease to any combination of host and guest languages. Categories and Subject Desc...
Martin Bravenboer, Eelco Dolstra, Eelco Visser
Added 07 Jun 2010
Updated 07 Jun 2010
Type Conference
Year 2007
Where GPCE
Authors Martin Bravenboer, Eelco Dolstra, Eelco Visser
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