add a js/empty-password-in-configuration-file query

javascript/ql/src/Security/CWE-313/PasswordInConfigurationFile.ql

@@ -14,47 +14,12 @@
  */
 
 import javascript
-import semmle.javascript.RestrictedLocations
-import semmle.javascript.security.SensitiveActions
-
-/**
- * Holds if some JSON or YAML file contains a property with name `key`
- * and value `val`, where `valElement` is the entity corresponding to the
- * value.
- *
- * Dependencies in `package.json` files are excluded by this predicate.
- */
-predicate config(string key, string val, Locatable valElement) {
-  exists(JSONObject obj | not exists(PackageJSON p | obj = p.getADependenciesObject(_)) |
-    obj.getPropValue(key) = valElement and
-    val = valElement.(JSONString).getValue()
-  )
-  or
-  exists(YAMLMapping m, YAMLString keyElement |
-    m.maps(keyElement, valElement) and
-    key = keyElement.getValue() and
-    val = valElement.(YAMLString).getValue()
-  )
-}
-
-/**
- * Holds if file `f` should be excluded because it looks like it may be
- * an API specification, a dictionary file, or a test or example.
- */
-predicate exclude(File f) {
-  f.getRelativePath().regexpMatch("(?i).*(^|/)(lang(uage)?s?|locales?|tests?|examples?|i18n)/.*")
-  or
-  f.getStem().regexpMatch("(?i)translations?")
-  or
-  f.getExtension().toLowerCase() = "raml"
-}
+import semmle.javascript.security.PasswordInConfigurationFileQuery
 
 from string key, string val, Locatable valElement, string pwd
 where
   config(key, val, valElement) and
   val != "" and
-  // exclude possible templates
-  not val.regexpMatch(Templating::getDelimiterMatchingRegexp()) and
   (
     key.toLowerCase() = "password" and
     pwd = val and
@@ -66,6 +31,5 @@ where
     // look for `password=...`, but exclude `password=;`, `password="$(...)"`,
     // `password=%s` and `password==`
     pwd = val.regexpCapture("(?is).*password\\s*=\\s*(?!;|\"?[$`]|%s|=)(\\S+).*", 1)
-  ) and
-  not exclude(valElement.getFile())
+  )
 select valElement.(FirstLineOf), "Hard-coded password '" + pwd + "' in configuration file."

javascript/ql/src/Security/CWE-862/EmptyPasswordInConfigurationFile.qhelp

@@ -0,0 +1,16 @@
+<!DOCTYPE qhelp PUBLIC
+  "-//Semmle//qhelp//EN"
+  "qhelp.dtd">
+<qhelp>
+<overview>
+<p>The use of an empty string as a password in a configuration file is not secure.</p>
+
+</overview>
+<recommendation>
+<p>Choose a proper password and encrypt it if you need to store it in the configuration file.</p>
+
+</recommendation>
+<references>
+
+</references>
+</qhelp>

javascript/ql/src/Security/CWE-862/EmptyPasswordInConfigurationFile.ql

@@ -0,0 +1,27 @@
+/**
+ * @name Password in configuration file
+ * @description Storing unencrypted passwords in configuration files is unsafe.
+ * @kind problem
+ * @problem.severity warning
+ * @security-severity 7.5
+ * @precision medium
+ * @id js/empty-password-in-configuration-file
+ * @tags security
+ *       external/cwe/cwe-258
+ *       external/cwe/cwe-862
+ */
+
+import javascript
+import semmle.javascript.security.PasswordInConfigurationFileQuery
+
+from string key, string val, Locatable valElement
+where
+  config(key, val, valElement) and
+  (
+    val = "" and key.toLowerCase() = "password"
+    or
+    key.toLowerCase() != "readme" and
+    // look for `password=;`, `password=`, `password=  `, `password==`.
+    val.regexpMatch("(?is).*password\\s*(==?|:)\\s*(\\\"\\\"|''|``|;|:)?\\s*($|;|&|]|\\n).*")
+  )
+select valElement.(FirstLineOf), "Empty password in configuration file."

javascript/ql/src/change-notes/2022-01-18-empty-password-in-configuration-file.md

@@ -0,0 +1,4 @@
+---
+category: newQuery
+---
+* A new query `js/empty-password-in-configuration-file` has been added. The query detects empty passwords in configuration files. The query is not run by default.