Merge pull request #17922 from joefarebrother/python-promote-template-injection

Python: Promote Template Injection query from experimental

Author: joefarebrother

python/ql/lib/semmle/python/Concepts.qll

@@ -861,6 +861,31 @@ class LdapFilterEscaping extends Escaping {
   LdapFilterEscaping() { super.getKind() = Escaping::getLdapFilterKind() }
 }
 
+/**
+ * A data-flow node that constructs a template in a templating engine.
+ *
+ * Extend this class to refine existing API models. If you want to model new APIs,
+ * extend `TemplateConstruction::Range` instead.
+ */
+class TemplateConstruction extends DataFlow::Node instanceof TemplateConstruction::Range {
+  /** Gets the argument that specifies the template source. */
+  DataFlow::Node getSourceArg() { result = super.getSourceArg() }
+}
+
+/** Provides classes for modeling template construction APIs. */
+module TemplateConstruction {
+  /**
+   * A data-flow node that constructs a template in a templating engine.
+   *
+   * Extend this class to model new APIs. If you want to refine existing API models,
+   * extend `TemplateConstruction` instead.
+   */
+  abstract class Range extends DataFlow::Node {
+    /** Gets the argument that specifies the template source. */
+    abstract DataFlow::Node getSourceArg();
+  }
+}
+
 /** Provides classes for modeling HTTP-related APIs. */
 module Http {
   /** Gets an HTTP verb, in upper case */

python/ql/lib/semmle/python/Frameworks.qll

@@ -11,13 +11,16 @@ private import semmle.python.frameworks.Aiohttp
 private import semmle.python.frameworks.Aiomysql
 private import semmle.python.frameworks.Aiopg
 private import semmle.python.frameworks.Aiosqlite
+private import semmle.python.frameworks.Airspeed
 private import semmle.python.frameworks.Anyio
 private import semmle.python.frameworks.Asyncpg
 private import semmle.python.frameworks.Baize
-private import semmle.python.frameworks.BSon
 private import semmle.python.frameworks.Bottle
+private import semmle.python.frameworks.BSon
 private import semmle.python.frameworks.CassandraDriver
+private import semmle.python.frameworks.Chameleon
 private import semmle.python.frameworks.Cherrypy
+private import semmle.python.frameworks.Chevron
 private import semmle.python.frameworks.ClickhouseDriver
 private import semmle.python.frameworks.Cryptodome
 private import semmle.python.frameworks.Cryptography
@@ -30,10 +33,12 @@ private import semmle.python.frameworks.FastApi
 private import semmle.python.frameworks.Flask
 private import semmle.python.frameworks.FlaskAdmin
 private import semmle.python.frameworks.FlaskSqlAlchemy
+private import semmle.python.frameworks.Genshi
 private import semmle.python.frameworks.Gradio
 private import semmle.python.frameworks.Httpx
 private import semmle.python.frameworks.Idna
 private import semmle.python.frameworks.Invoke
+private import semmle.python.frameworks.Jinja2
 private import semmle.python.frameworks.Jmespath
 private import semmle.python.frameworks.Joblib
 private import semmle.python.frameworks.JsonPickle
@@ -42,6 +47,7 @@ private import semmle.python.frameworks.Ldap3
 private import semmle.python.frameworks.Libtaxii
 private import semmle.python.frameworks.Libxml2
 private import semmle.python.frameworks.Lxml
+private import semmle.python.frameworks.Mako
 private import semmle.python.frameworks.MarkupSafe
 private import semmle.python.frameworks.Multidict
 private import semmle.python.frameworks.Mysql
@@ -78,6 +84,7 @@ private import semmle.python.frameworks.Streamlit
 private import semmle.python.frameworks.Toml
 private import semmle.python.frameworks.Torch
 private import semmle.python.frameworks.Tornado
+private import semmle.python.frameworks.TRender
 private import semmle.python.frameworks.Twisted
 private import semmle.python.frameworks.Ujson
 private import semmle.python.frameworks.Urllib3

python/ql/lib/semmle/python/frameworks/Airspeed.qll

@@ -0,0 +1,25 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `airspeed` library.
+ * See https://github.com/purcell/airspeed.
+ */
+
+private import python
+private import semmle.python.ApiGraphs
+private import semmle.python.Concepts
+
+/**
+ * INTERNAL: Do not use.
+ *
+ * Provides classes modeling security-relevant aspects of the `airspeed` library.
+ * See https://github.com/purcell/airspeed.
+ */
+module Airspeed {
+  /** A call to `airspeed.Template`. */
+  private class AirspeedTemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+    AirspeedTemplateConstruction() {
+      this = API::moduleImport("airspeed").getMember("Template").getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
+}

python/ql/lib/semmle/python/frameworks/Bottle.qll

@@ -39,7 +39,7 @@ module Bottle {
         ViewCallable() { this = any(BottleRouteSetup rs).getARequestHandler() }
       }
 
-      /** Get methods that reprsent a route in Bottle */
+      /** Get methods that represent a route in Bottle */
       string routeMethods() { result = ["route", "get", "post", "put", "delete", "patch"] }
 
       private class BottleRouteSetup extends Http::Server::RouteSetup::Range, DataFlow::CallCfgNode {
@@ -171,5 +171,17 @@ module Bottle {
         override predicate valueAllowsNewline() { none() }
       }
     }
+
+    /** Provides models for functions that construct templates. */
+    module Templates {
+      /** A call to `bottle.template`or `bottle.SimpleTemplate`. */
+      private class BottleTemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+        BottleTemplateConstruction() {
+          this = API::moduleImport("bottle").getMember(["template", "SimpleTemplate"]).getACall()
+        }
+
+        override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+      }
+    }
   }
 }

python/ql/lib/semmle/python/frameworks/Chameleon.qll

@@ -0,0 +1,25 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `chameleon` PyPI package.
+ * See https://chameleon.readthedocs.io/en/latest/.
+ */
+
+private import python
+private import semmle.python.ApiGraphs
+private import semmle.python.Concepts
+
+/**
+ * INTERNAL: Do not use.
+ *
+ * Provides classes modeling security-relevant aspects of the `chameleon` PyPI package.
+ * See https://chameleon.readthedocs.io/en/latest/.
+ */
+module Chameleon {
+  /** A call to `chameleon.PageTemplate`. */
+  private class ChameleonTemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+    ChameleonTemplateConstruction() {
+      this = API::moduleImport("chameleon").getMember("PageTemplate").getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
+}

python/ql/lib/semmle/python/frameworks/Chevron.qll

@@ -0,0 +1,25 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `chevron` PyPI package.
+ * See https://pypi.org/project/chevron.
+ */
+
+private import python
+private import semmle.python.ApiGraphs
+private import semmle.python.Concepts
+
+/**
+ * INTERNAL: Do not use.
+ *
+ * Provides classes modeling security-relevant aspects of the `chevron` PyPI package.
+ * See https://pypi.org/project/chevron.
+ */
+module Chevron {
+  /** A call to `chevron.render`. */
+  private class ChevronRenderConstruction extends TemplateConstruction::Range, API::CallNode {
+    ChevronRenderConstruction() {
+      this = API::moduleImport("chevron").getMember("render").getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
+}

python/ql/lib/semmle/python/frameworks/Django.qll

@@ -2996,4 +2996,17 @@ module PrivateDjango {
       any()
     }
   }
+
+  // ---------------------------------------------------------------------------
+  // Templates
+  // ---------------------------------------------------------------------------
+  /** A call to `django.template.Template` */
+  private class DjangoTemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+    DjangoTemplateConstruction() {
+      this = API::moduleImport("django").getMember("template").getMember("Template").getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
+  // TODO: Support `from_string` on instances of `django.template.Engine`.
 }

python/ql/lib/semmle/python/frameworks/Flask.qll

@@ -721,4 +721,16 @@ module Flask {
       preservesValue = false
     }
   }
+
+  /** A call to `flask.render_template_string` or `flask.stream_template_string` as a template construction sink. */
+  private class FlaskTemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+    FlaskTemplateConstruction() {
+      this =
+        API::moduleImport("flask")
+            .getMember(["render_template_string", "stream_template_string"])
+            .getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
 }

python/ql/lib/semmle/python/frameworks/Genshi.qll

@@ -0,0 +1,44 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `Genshi` PyPI package.
+ * See https://genshi.edgewall.org/.
+ */
+
+private import python
+private import semmle.python.ApiGraphs
+private import semmle.python.Concepts
+
+/**
+ * INTERNAL: Do not use.
+ *
+ * Provides classes modeling security-relevant aspects of the `Genshi` PyPI package.
+ * See https://genshi.edgewall.org/.
+ */
+module Genshi {
+  /** A call to `genshi.template.text.NewTextTemplate` or `genshi.template.text.OldTextTemplate`. */
+  private class GenshiTextTemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+    GenshiTextTemplateConstruction() {
+      this =
+        API::moduleImport("genshi")
+            .getMember("template")
+            .getMember("text")
+            .getMember(["NewTextTemplate", "OldTextTemplate", "TextTemplate"])
+            .getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
+
+  /** A call to `genshi.template.MarkupTemplate` */
+  private class GenshiMarkupTemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+    GenshiMarkupTemplateConstruction() {
+      this =
+        API::moduleImport("genshi")
+            .getMember("template")
+            .getMember("markup")
+            .getMember("MarkupTemplate")
+            .getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
+}

python/ql/lib/semmle/python/frameworks/Jinja2.qll

@@ -0,0 +1,48 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `jinja2` PyPI package.
+ * See https://jinja.palletsprojects.com.
+ */
+
+private import python
+private import semmle.python.ApiGraphs
+private import semmle.python.Concepts
+private import semmle.python.frameworks.data.ModelsAsData
+
+/**
+ * INTERNAL: Do not use
+ *
+ * Provides classes modeling security-relevant aspects of the `jinja2` PyPI package.
+ * See https://jinja.palletsprojects.com.
+ */
+module Jinja2 {
+  /** A call to `jinja2.Template`. */
+  private class Jinja2TemplateConstruction extends TemplateConstruction::Range, API::CallNode {
+    Jinja2TemplateConstruction() {
+      this = API::moduleImport("jinja2").getMember("Template").getACall()
+    }
+
+    override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+  }
+
+  /** Definitions for modeling jinja `Environment`s. */
+  module EnvironmentClass {
+    /** Gets a reference to the `jinja2.Environment` class. */
+    API::Node classRef() {
+      result = API::moduleImport("jinja2").getMember("Environment")
+      or
+      result = ModelOutput::getATypeNode("jinja.Environment~Subclass").getASubclass*()
+    }
+
+    /** Gets a reference to an instance of `jinja2.Environment`. */
+    API::Node instance() { result = classRef().getAnInstance() }
+
+    /** A call to `jinja2.Environment.from_string`. */
+    private class Jinja2FromStringConstruction extends TemplateConstruction::Range, API::CallNode {
+      Jinja2FromStringConstruction() {
+        this = EnvironmentClass::instance().getMember("from_string").getACall()
+      }
+
+      override DataFlow::Node getSourceArg() { result = this.getArg(0) }
+    }
+  }
+}