mirror of
https://github.com/hohn/codeql-lab.git
synced 2025-12-15 17:43:04 +01:00
major revision
This commit is contained in:
Michael Hohn
committed by
=Michael Hohn
=Michael Hohn
parent
a43b5a3df8
commit
fa875f4ea0
@@ -124,109 +124,109 @@
|
||||
|
||||
to include =readLine()= even though we extended =RemoteFlowSource=.
|
||||
|
||||
** TODO supplement codeql: Add to models-as-data
|
||||
- schema in codeql: [[../ql/java/ql/lib/semmle/code/java/dataflow/internal/ExternalFlowExtensions.qll]]
|
||||
** Supplement CodeQL: Add to models-as-data
|
||||
|
||||
- data sample: [[../.github/codeql/extensions/jedis-db-local-java/models/redis.clients.jedis.model.yml]]
|
||||
To modify the dataflow configuration using the models-as-data mechanism, we will explicitly define a new source model for =java.io.Console.readLine=. This function is already modeled in CodeQL—but only as a =summaryModel=. For SQL injection tracking, we want to treat it as a =sourceModel=. Since it’s already covered in auto-generated data, it does not appear in the model editor interface.
|
||||
|
||||
In the model editor, we see a java.io.*Console.*readline' (using =show already modeled= option)
|
||||
#+BEGIN_SRC sh
|
||||
1:$ rg -i 'java.io.*Console.*readline' ql/java
|
||||
ql/java/ql/lib/ext/generated/java.io.model.yml
|
||||
16: - ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
17: - ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[0]", "Argument[this]", "taint", "df-generated"]
|
||||
18: - ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[1].ArrayElement", "Argument[this]", "taint", "df-generated"]
|
||||
19: - ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
#+END_SRC
|
||||
note: this file is in the generated/ tree. There are others.
|
||||
We begin by locating the existing model:
|
||||
|
||||
The current readline modeling is in the =summaryModel= section; we need it
|
||||
in a =sourceModel=
|
||||
#+BEGIN_SRC yaml
|
||||
extensions:
|
||||
- addsTo:
|
||||
pack: codeql/java-all
|
||||
extensible: summaryModel
|
||||
data:
|
||||
...
|
||||
- ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[0]", "Argument[this]", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[1].ArrayElement", "Argument[this]", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument
|
||||
#+END_SRC
|
||||
- The model schema used for extensions is defined here:
|
||||
[[../ql/java/ql/lib/semmle/code/java/dataflow/internal/ExternalFlowExtensions.qll]]
|
||||
|
||||
The model editor will not show this because its already modeled. To
|
||||
illustrate text-based additions, we'll use plain text.
|
||||
Starting from
|
||||
#+BEGIN_SRC yaml
|
||||
extensions:
|
||||
- addsTo:
|
||||
pack: codeql/java-all
|
||||
extensible: summaryModel
|
||||
data:
|
||||
...
|
||||
- ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[0]", "Argument[this]", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[1].ArrayElement", "Argument[this]", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument
|
||||
#+END_SRC
|
||||
and the field information
|
||||
#+BEGIN_SRC java
|
||||
extensible predicate sourceModel(
|
||||
string package, string type, boolean subtypes, string name, string signature, string ext,
|
||||
string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
);
|
||||
#+END_SRC
|
||||
Starting from =summaryModel=
|
||||
#+BEGIN_SRC yaml
|
||||
# summaryModel
|
||||
# string package, string type, boolean subtypes, string name, string signature, string ext, string input, string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
- ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
#+END_SRC
|
||||
- For reference, see a sample manually written model YAML:
|
||||
[[../.github/codeql/extensions/jedis-db-local-java/models/redis.clients.jedis.model.yml]]
|
||||
|
||||
we can construct the =sourceModel=
|
||||
#+BEGIN_SRC yaml
|
||||
extensions:
|
||||
- addsTo:
|
||||
pack: codeql/java-all
|
||||
extensible: sourceModel
|
||||
data:
|
||||
# sourceModel
|
||||
# string package, string type, boolean subtypes, string name, string signature, string ext, string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
- ["java.io", "Console", False, "readLine", "()", "", "ReturnValue", "remote", "manual"]
|
||||
- To verify that readline is already modeled, use ripgrep:
|
||||
#+BEGIN_SRC sh
|
||||
1:$ rg -i 'java.io.*Console.*readline' ql/java
|
||||
ql/java/ql/lib/ext/generated/java.io.model.yml
|
||||
16: - ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
17: - ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[0]", "Argument[this]", "taint", "df-generated"]
|
||||
18: - ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[1].ArrayElement", "Argument[this]", "taint", "df-generated"]
|
||||
19: - ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
#+END_SRC
|
||||
|
||||
# # from original
|
||||
# # summaryModel
|
||||
# # string package, string type, boolean subtypes, string name, string signature, string ext, string input, string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
# - ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
Note: this model is auto-generated (=df-generated=) and appears under =summaryModel=.
|
||||
|
||||
#+END_SRC
|
||||
Here is an example of that structure:
|
||||
#+BEGIN_SRC yaml
|
||||
extensions:
|
||||
- addsTo:
|
||||
pack: codeql/java-all
|
||||
extensible: summaryModel
|
||||
data:
|
||||
...
|
||||
- ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[0]", "Argument[this]", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument[1].ArrayElement", "Argument[this]", "taint", "df-generated"]
|
||||
- ["java.io", "Console", False, "readLine", "(String,Object[])", "", "Argument
|
||||
#+END_SRC
|
||||
|
||||
and move this into [[../.github/codeql/extensions/sqlite-db/models/sqlite.model.yml]]
|
||||
|
||||
Because this modeling is already present, the model editor UI will hide the
|
||||
function. To override it, we’ll define a new source manually in plain YAML.
|
||||
|
||||
First, recall the schema definition for =sourceModel=:
|
||||
|
||||
To ensure that these model extensions are applied during query runs, include
|
||||
this setting
|
||||
#+begin_src javascript
|
||||
{
|
||||
#+BEGIN_SRC java
|
||||
extensible predicate sourceModel(
|
||||
string package, string type, boolean subtypes, string name, string signature, string ext,
|
||||
string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
);
|
||||
#+END_SRC
|
||||
|
||||
Starting from the existing =summaryModel=,
|
||||
|
||||
#+BEGIN_SRC yaml
|
||||
# summaryModel
|
||||
# string package, string type, boolean subtypes, string name, string signature, string ext, string input, string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
- ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
#+END_SRC
|
||||
|
||||
we construct the following =sourceModel= definition instead:
|
||||
|
||||
#+BEGIN_SRC yaml
|
||||
extensions:
|
||||
- addsTo:
|
||||
pack: codeql/java-all
|
||||
extensible: sourceModel
|
||||
data:
|
||||
# sourceModel
|
||||
# string package, string type, boolean subtypes, string name, string signature, string ext, string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
- ["java.io", "Console", False, "readLine", "()", "", "ReturnValue", "remote", "manual"]
|
||||
|
||||
# # from original
|
||||
# # summaryModel
|
||||
# # string package, string type, boolean subtypes, string name, string signature, string ext, string input, string output, string kind, string provenance, QlBuiltins::ExtensionId madId
|
||||
# - ["java.io", "Console", False, "readLine", "()", "", "Argument[this]", "ReturnValue", "taint", "df-generated"]
|
||||
#+END_SRC
|
||||
|
||||
Place this in:
|
||||
|
||||
[[../.github/codeql/extensions/sqlite-db/models/sqlite.model.yml]]
|
||||
|
||||
To ensure the model extension is applied, you must instruct the CodeQL
|
||||
extension to include all extension packs. In =qllab.code-workspace=, add:
|
||||
|
||||
#+BEGIN_SRC javascript
|
||||
{
|
||||
...,
|
||||
"settings": {
|
||||
...,
|
||||
"settings": {
|
||||
...,
|
||||
"codeQL.runningQueries.useExtensionPacks": "all"
|
||||
}
|
||||
"codeQL.runningQueries.useExtensionPacks": "all"
|
||||
}
|
||||
#+end_src
|
||||
}
|
||||
#+END_SRC
|
||||
|
||||
in the workspace configuration file [[../qllab.code-workspace]]
|
||||
If needed, also include this setting in =.vscode/settings.json=:
|
||||
|
||||
In some environments (e.g., older VS Code versions), you may also need to
|
||||
replicate this setting in [[../.vscode/settings.json]]; there it simplifies to
|
||||
#+begin_src javascript
|
||||
"codeQL.runningQueries.useExtensionPacks": "all"
|
||||
#+end_src
|
||||
|
||||
Now we can run [[../ql/java/ql/src/Security/CWE/CWE-089/SqlTainted.ql]] again.
|
||||
#+BEGIN_SRC javascript
|
||||
"codeQL.runningQueries.useExtensionPacks": "all"
|
||||
#+END_SRC
|
||||
|
||||
Now re-run the query:
|
||||
|
||||
[[../ql/java/ql/src/Security/CWE/CWE-089/SqlTainted.ql]]
|
||||
|
||||
You should see flows that originate at =readLine()= and reach the SQL sink. This confirms that your manual =sourceModel= extension is effective.
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user