The software accepts XML from an untrusted source but does not
validate the XML against the proper schema.
Extended Description
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.
Time of Introduction
Implementation
Applicable Platforms
Languages
All
Demonstrative Examples
Example 1
The following code loads an XML file without validating it against a
known XML Schema or DTD.
Always validate XML input against a known XML Schema or DTD.
Other Notes
It is not possible for an XML parser to validate all aspects of a
document's content; 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.
Weakness Ordinalities
Ordinality
Description
Primary
(where the
weakness exists independent of other weaknesses)
Description
