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codeql/python/ql/lib/semmle/python/frameworks/Libxml2.qll
Rasmus Lerchedahl Petersen ee45e79948 python: Create XML modulein Concepts
to prepare for XXE and other XML related modelling
2022-03-02 13:10:23 +01:00

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/**
* Provides classes modeling security-relevant aspects of the `libxml2` PyPI package.
*
* See
* - https://pypi.org/project/libxml2-python3/
* - http://xmlsoft.org/python.html
*/
private import python
private import semmle.python.dataflow.new.DataFlow
private import semmle.python.Concepts
private import semmle.python.ApiGraphs
/**
* Provides classes modeling security-relevant aspects of the `libxml2` PyPI package
*
* See
* - https://pypi.org/project/libxml2-python3/
* - http://xmlsoft.org/python.html
*/
private module Libxml2 {
/**
* A call to the `xpathEval` method of a parsed document.
*
* import libxml2
* tree = libxml2.parseFile("file.xml")
* r = tree.xpathEval('`sink`')
*
* See http://xmlsoft.org/python.html
*/
class XpathEvalCall extends XML::XPathExecution::Range, DataFlow::CallCfgNode {
XpathEvalCall() {
this =
API::moduleImport("libxml2")
.getMember("parseFile")
.getReturn()
.getMember("xpathEval")
.getACall()
}
override DataFlow::Node getXPath() { result = this.getArg(0) }
override string getName() { result = "libxml2" }
}
}