TensorFlow is an open source platform for machine learning. The implementation of FractionalAvgPoolGrad does not fully validate the input orig_input_tensor_shape. This results in an overflow that results in a CHECK failure which can be used to trigger a denial of service attack. We have patched the issue in GitHub commit 03a659d7be9a1154fdf5eeac221e5950fec07dad. The fix will be included in TensorFlow 2.10.0. We will also cherrypick this commit on TensorFlow 2.9.1, TensorFlow 2.8.1, and TensorFlow 2.7.2, as these are also affected and still in supported range. There are no known workarounds for this issue.
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tensorflow | 2.7.0 (including) | 2.7.2 (excluding) | |
| Tensorflow | 2.8.0 (including) | 2.8.0 (including) | |
| Tensorflow | 2.9.0 (including) | 2.9.0 (including) | |
| Tensorflow | 2.10-rc0 (including) | 2.10-rc0 (including) | |
| Tensorflow | 2.10-rc1 (including) | 2.10-rc1 (including) | |
| Tensorflow | 2.10-rc2 (including) | 2.10-rc2 (including) | |
| Tensorflow | 2.10-rc3 (including) | 2.10-rc3 (including) |
While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service. For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.