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C++: Update NonConstantFormat with DataFlow::ConfigSig

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This commit is contained in:
Jeroen Ketema
2023-03-08 14:45:50 +01:00
parent 661160a98e
commit e65ba13da4
1 changed files with 9 additions and 9 deletions
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18
cpp/ql/src/Likely Bugs/Format/NonConstantFormat.ql
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@@ -120,7 +120,7 @@ predicate isNonConst(DataFlow::Node node, boolean isIndirect) {
}
pragma[noinline]
predicate isSanitizerNode(DataFlow::Node node) {
predicate isBarrierNode(DataFlow::Node node) {
underscoreMacro([node.asExpr(), node.asIndirectExpr()])
or
exists(node.asExpr()) and
@@ -132,10 +132,8 @@ predicate isSinkImpl(DataFlow::Node sink, Expr formatString) {
exists(FormattingFunctionCall fc | formatString = fc.getArgument(fc.getFormatParameterIndex()))
}
class NonConstFlow extends TaintTracking::Configuration {
NonConstFlow() { this = "NonConstFlow" }
override predicate isSource(DataFlow::Node source) {
module NonConstFlowConfiguration implements DataFlow::ConfigSig {
predicate isSource(DataFlow::Node source) {
exists(boolean isIndirect, Type t |
isNonConst(source, isIndirect) and
t = source.getType() and
@@ -143,16 +141,18 @@ class NonConstFlow extends TaintTracking::Configuration {
)
}
override predicate isSink(DataFlow::Node sink) { isSinkImpl(sink, _) }
predicate isSink(DataFlow::Node sink) { isSinkImpl(sink, _) }
override predicate isSanitizer(DataFlow::Node node) { isSanitizerNode(node) }
predicate isBarrier(DataFlow::Node node) { isBarrierNode(node) }
}
module NonConstFlow = TaintTracking::Make<NonConstFlowConfiguration>;
from FormattingFunctionCall call, Expr formatString
where
call.getArgument(call.getFormatParameterIndex()) = formatString and
exists(NonConstFlow cf, DataFlow::Node sink |
cf.hasFlowTo(sink) and
exists(DataFlow::Node sink |
NonConstFlow::hasFlowTo(sink) and
isSinkImpl(sink, formatString)
)
select formatString,