Missing XML Validation

Opis

The product accepts XML from an untrusted source but does not validate the XML against the proper schema.

Most successful attacks begin with a violation of the programmer's assumptions. By accepting an XML document without validating it against a DTD or XML schema, the programmer leaves a door open for attackers to provide unexpected, unreasonable, or malicious input.

Skutki

• Integrity

  Unexpected State

Zapobieganie

• Architecture and Design · Input Validation

  Always validate XML input against a known XML Schema or DTD.

  It is not possible for an XML parser to validate all aspects of a document's content because a parser cannot understand the complete semantics of the data. However, a parser can do a complete and thorough job of checking the document's structure and therefore guarantee to the code that processes the document that the content is well-formed.

Słabość nadrzędna

• CWE-1286 Improper Validation of Syntactic Correctness of Input
• CWE-20 Improper Input Validation

Kiedy powstaje

• Implementation

Dotyczy

Not Language-Specific

Źródła

1. Seven Pernicious Kingdoms: A Taxonomy of Software Security Errors — Katrina Tsipenyuk, Brian Chess, Gary McGraw, NIST, 2005