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Callable.call() should not be a sink in JexlInjection.ql

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This commit is contained in:
Artem Smotrakov
2021-02-11 20:37:23 +01:00
parent af0f361ac8
commit 7543df60da
2 changed files with 32 additions and 47 deletions
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61
java/ql/src/experimental/Security/CWE/CWE-094/JexlInjectionLib.qll
View File

@@ -36,6 +36,11 @@ private class TaintedSpringRequestBody extends DataFlow::Node {
/**
* A sink for Expresssion Language injection vulnerabilities via Jexl,
* i.e. method calls that run evaluation of a Jexl expression.
*
* Creating a `Callable` from a tainted Jexl expression or script is considered as a sink
* although the tainted expression is not executed at this point.
* Here we assume that it will get executed at some point,
* maybe stored in an object field and then reached by a different flow.
*/
private class JexlEvaluationSink extends DataFlow::ExprNode {
JexlEvaluationSink() {
@@ -44,13 +49,11 @@ private class JexlEvaluationSink extends DataFlow::ExprNode {
|
m instanceof DirectJexlEvaluationMethod and ma.getQualifier() = taintFrom
or
m instanceof CallableCallMethod and ma.getQualifier() = taintFrom
m instanceof CreateJexlCallableMethod and ma.getQualifier() = taintFrom
or
m instanceof JexlEngineGetSetPropertyMethod and
exists(Expr arg, int index | arg = ma.getArgument(index) and index = [1, 2] |
arg.getType() instanceof TypeString and
arg = taintFrom
)
taintFrom.getType() instanceof TypeString and
ma.getAnArgument() = taintFrom
)
}
}
@@ -67,23 +70,20 @@ private class TaintPropagatingJexlMethodCall extends MethodAccess {
this.getMethod() = m and
taintType = taintFromExpr.getType()
|
m instanceof CreateJexlScriptMethod and
taintFromExpr = this.getArgument(0) and
taintType instanceof TypeString and
isUnsafeEngine(this.getQualifier())
or
m instanceof CreateJexlCallableMethod and
taintFromExpr = this.getQualifier()
or
m instanceof CreateJexlExpressionMethod and
taintFromExpr = this.getAnArgument() and
taintType instanceof TypeString and
isUnsafeEngine(this.getQualifier())
or
m instanceof CreateJexlTemplateMethod and
(taintType instanceof TypeString or taintType instanceof Reader) and
taintFromExpr = this.getArgument([0, 1]) and
isUnsafeEngine(this.getQualifier())
isUnsafeEngine(this.getQualifier()) and
(
m instanceof CreateJexlScriptMethod and
taintFromExpr = this.getArgument(0) and
taintType instanceof TypeString
or
m instanceof CreateJexlExpressionMethod and
taintFromExpr = this.getAnArgument() and
taintType instanceof TypeString
or
m instanceof CreateJexlTemplateMethod and
(taintType instanceof TypeString or taintType instanceof Reader) and
taintFromExpr = this.getArgument([0, 1])
)
)
}
@@ -97,7 +97,7 @@ private class TaintPropagatingJexlMethodCall extends MethodAccess {
}
/**
* Holds if `expr` is one of the Jexl engines that is not configured with a sandbox.
* Holds if `expr` is a Jexl engine that is not configured with a sandbox.
*/
private predicate isUnsafeEngine(Expr expr) {
not exists(SandboxedJexlFlowConfig config | config.hasFlowTo(DataFlow::exprNode(expr)))
@@ -182,13 +182,6 @@ private class DirectJexlEvaluationMethod extends Method {
}
}
/**
* A method in the `Callable` class that executes the `Callable`.
*/
private class CallableCallMethod extends Method {
CallableCallMethod() { getDeclaringType() instanceof CallableInterface and hasName("call") }
}
/**
* Defines methods that create a Jexl script.
*/
@@ -272,14 +265,6 @@ private class UnifiedJexlTemplate extends NestedType {
UnifiedJexlTemplate() { getEnclosingType() instanceof UnifiedJexl and hasName("Template") }
}
private class CallableInterface extends RefType {
CallableInterface() {
getSourceDeclaration()
.getASourceSupertype*()
.hasQualifiedName("java.util.concurrent", "Callable")
}
}
private class Reader extends RefType {
Reader() { hasQualifiedName("java.io", "Reader") }
}

18
java/ql/test/experimental/query-tests/security/CWE-094/JexlInjection.expected
View File

@@ -2,7 +2,7 @@ edges
| Jexl2Injection.java:10:43:10:57 | jexlExpr : String | Jexl2Injection.java:14:9:14:9 | e |
| Jexl2Injection.java:17:55:17:69 | jexlExpr : String | Jexl2Injection.java:22:9:22:9 | e |
| Jexl2Injection.java:25:39:25:53 | jexlExpr : String | Jexl2Injection.java:29:9:29:14 | script |
| Jexl2Injection.java:32:50:32:64 | jexlExpr : String | Jexl2Injection.java:38:13:38:31 | callable(...) |
| Jexl2Injection.java:32:50:32:64 | jexlExpr : String | Jexl2Injection.java:38:13:38:18 | script |
| Jexl2Injection.java:44:57:44:71 | jexlExpr : String | Jexl2Injection.java:46:40:46:47 | jexlExpr |
| Jexl2Injection.java:49:57:49:71 | jexlExpr : String | Jexl2Injection.java:51:40:51:47 | jexlExpr |
| Jexl2Injection.java:54:73:54:87 | jexlExpr : String | Jexl2Injection.java:57:9:57:35 | parse(...) |
@@ -39,13 +39,13 @@ edges
| Jexl3Injection.java:15:43:15:57 | jexlExpr : String | Jexl3Injection.java:19:9:19:9 | e |
| Jexl3Injection.java:22:55:22:69 | jexlExpr : String | Jexl3Injection.java:26:9:26:9 | e |
| Jexl3Injection.java:29:39:29:53 | jexlExpr : String | Jexl3Injection.java:33:9:33:14 | script |
| Jexl3Injection.java:36:50:36:64 | jexlExpr : String | Jexl3Injection.java:42:13:42:31 | callable(...) |
| Jexl3Injection.java:36:50:36:64 | jexlExpr : String | Jexl3Injection.java:42:13:42:18 | script |
| Jexl3Injection.java:48:57:48:71 | jexlExpr : String | Jexl3Injection.java:50:40:50:47 | jexlExpr |
| Jexl3Injection.java:53:57:53:71 | jexlExpr : String | Jexl3Injection.java:55:40:55:47 | jexlExpr |
| Jexl3Injection.java:58:74:58:88 | jexlExpr : String | Jexl3Injection.java:61:9:61:39 | createExpression(...) |
| Jexl3Injection.java:64:73:64:87 | jexlExpr : String | Jexl3Injection.java:67:9:67:39 | createExpression(...) |
| Jexl3Injection.java:70:72:70:86 | jexlExpr : String | Jexl3Injection.java:73:9:73:37 | createTemplate(...) |
| Jexl3Injection.java:76:54:76:68 | jexlExpr : String | Jexl3Injection.java:82:13:82:26 | callable(...) |
| Jexl3Injection.java:76:54:76:68 | jexlExpr : String | Jexl3Injection.java:82:13:82:13 | e |
| Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:94:31:94:38 | jexlExpr : String |
| Jexl3Injection.java:94:31:94:38 | jexlExpr : String | Jexl3Injection.java:102:24:102:56 | jexlExpr : String |
| Jexl3Injection.java:94:31:94:38 | jexlExpr : String | Jexl3Injection.java:106:24:106:68 | jexlExpr : String |
@@ -91,7 +91,7 @@ nodes
| Jexl2Injection.java:25:39:25:53 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl2Injection.java:29:9:29:14 | script | semmle.label | script |
| Jexl2Injection.java:32:50:32:64 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl2Injection.java:38:13:38:31 | callable(...) | semmle.label | callable(...) |
| Jexl2Injection.java:38:13:38:18 | script | semmle.label | script |
| Jexl2Injection.java:44:57:44:71 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl2Injection.java:46:40:46:47 | jexlExpr | semmle.label | jexlExpr |
| Jexl2Injection.java:49:57:49:71 | jexlExpr : String | semmle.label | jexlExpr : String |
@@ -129,7 +129,7 @@ nodes
| Jexl3Injection.java:29:39:29:53 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl3Injection.java:33:9:33:14 | script | semmle.label | script |
| Jexl3Injection.java:36:50:36:64 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl3Injection.java:42:13:42:31 | callable(...) | semmle.label | callable(...) |
| Jexl3Injection.java:42:13:42:18 | script | semmle.label | script |
| Jexl3Injection.java:48:57:48:71 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl3Injection.java:50:40:50:47 | jexlExpr | semmle.label | jexlExpr |
| Jexl3Injection.java:53:57:53:71 | jexlExpr : String | semmle.label | jexlExpr : String |
@@ -141,7 +141,7 @@ nodes
| Jexl3Injection.java:70:72:70:86 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl3Injection.java:73:9:73:37 | createTemplate(...) | semmle.label | createTemplate(...) |
| Jexl3Injection.java:76:54:76:68 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl3Injection.java:82:13:82:26 | callable(...) | semmle.label | callable(...) |
| Jexl3Injection.java:82:13:82:13 | e | semmle.label | e |
| Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | semmle.label | getInputStream(...) : InputStream |
| Jexl3Injection.java:94:31:94:38 | jexlExpr : String | semmle.label | jexlExpr : String |
| Jexl3Injection.java:102:24:102:56 | jexlExpr : String | semmle.label | jexlExpr : String |
@@ -174,7 +174,7 @@ nodes
| Jexl2Injection.java:14:9:14:9 | e | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:14:9:14:9 | e | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
| Jexl2Injection.java:22:9:22:9 | e | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:22:9:22:9 | e | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
| Jexl2Injection.java:29:9:29:14 | script | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:29:9:29:14 | script | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
| Jexl2Injection.java:38:13:38:31 | callable(...) | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:38:13:38:31 | callable(...) | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
| Jexl2Injection.java:38:13:38:18 | script | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:38:13:38:18 | script | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
| Jexl2Injection.java:46:40:46:47 | jexlExpr | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:46:40:46:47 | jexlExpr | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
| Jexl2Injection.java:51:40:51:47 | jexlExpr | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:51:40:51:47 | jexlExpr | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
| Jexl2Injection.java:57:9:57:35 | parse(...) | Jexl2Injection.java:76:25:76:47 | getInputStream(...) : InputStream | Jexl2Injection.java:57:9:57:35 | parse(...) | Jexl injection from $@. | Jexl2Injection.java:76:25:76:47 | getInputStream(...) | this user input |
@@ -186,10 +186,10 @@ nodes
| Jexl3Injection.java:19:9:19:9 | e | Jexl3Injection.java:161:13:161:52 | customRequest : CustomRequest | Jexl3Injection.java:19:9:19:9 | e | Jexl injection from $@. | Jexl3Injection.java:161:13:161:52 | customRequest | this user input |
| Jexl3Injection.java:26:9:26:9 | e | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:26:9:26:9 | e | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:33:9:33:14 | script | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:33:9:33:14 | script | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:42:13:42:31 | callable(...) | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:42:13:42:31 | callable(...) | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:42:13:42:18 | script | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:42:13:42:18 | script | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:50:40:50:47 | jexlExpr | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:50:40:50:47 | jexlExpr | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:55:40:55:47 | jexlExpr | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:55:40:55:47 | jexlExpr | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:61:9:61:39 | createExpression(...) | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:61:9:61:39 | createExpression(...) | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:67:9:67:39 | createExpression(...) | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:67:9:67:39 | createExpression(...) | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:73:9:73:37 | createTemplate(...) | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:73:9:73:37 | createTemplate(...) | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:82:13:82:26 | callable(...) | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:82:13:82:26 | callable(...) | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |
| Jexl3Injection.java:82:13:82:13 | e | Jexl3Injection.java:92:25:92:47 | getInputStream(...) : InputStream | Jexl3Injection.java:82:13:82:13 | e | Jexl injection from $@. | Jexl3Injection.java:92:25:92:47 | getInputStream(...) | this user input |