The implementation of GetInitOp
is vulnerable to a crash caused by dereferencing a null pointer:
const auto& init_op_sig_it =
meta_graph_def.signature_def().find(kSavedModelInitOpSignatureKey);
if (init_op_sig_it != sig_def_map.end()) {
*init_op_name = init_op_sig_it->second.outputs()
.find(kSavedModelInitOpSignatureKey)
->second.name();
return Status::OK();
}
Here, we have a nested map and we assume that if the first .find
succeeds then so would be the search in the internal map. However, the maps are built based on the SavedModel
protobuf format and a malicious user can alter that on disk before loading to cause the second .find
to return nullptr
.
We have patched the issue in GitHub commit 4f38b1ac8e42727e18a2f0bde06d3bee8e77b250.
The fix will be included in TensorFlow 2.8.0. We will also cherrypick this commit on TensorFlow 2.7.1, TensorFlow 2.6.3, and TensorFlow 2.5.3, as these are also affected and still in supported range.
Please consult our security guide for more information regarding the security model and how to contact us with issues and questions.
{ "nvd_published_at": "2022-02-04T23:15:00Z", "cwe_ids": [ "CWE-476" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2022-02-04T20:26:34Z" }