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sql injection: use post-update nodes for function return values

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This commit is contained in:
Michael Hohn
2020-07-20 16:16:40 -07:00
committed by =Michael Hohn
parent 5bce3ae696
commit ba3cfcb010
1 changed files with 2 additions and 2 deletions
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4
SqlInjection.ql
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@@ -17,7 +17,7 @@ class SqliFlowConfig extends TaintTracking::Configuration {
// count = read(STDIN_FILENO, buf, BUFSIZE);
exists(FunctionCall read |
read.getTarget().getName() = "read" and
read.getArgument(1) = source.asExpr()
read.getArgument(1) = source.(DataFlow::PostUpdateNode).getPreUpdateNode().asExpr()
)
}
@@ -33,7 +33,7 @@ class SqliFlowConfig extends TaintTracking::Configuration {
// #endif
exists(FunctionCall printf |
printf.getTarget().getName().matches("%snprintf%") and
printf.getArgument(0) = out.asExpr() and
printf.getArgument(0) = out.(DataFlow::PostUpdateNode).getPreUpdateNode().asExpr() and
// very specific: shifted index for macro. We can generalize this to consider
// all trailing arguments as sources.
printf.getArgument(6) = into.asExpr()