Vulnerability · Published May 14, 2021 · Assigned by GitHub_M
CVE-2021-29516Null pointer dereference via invalid Ragged Tensors
Low 2.5
In plain English
A low-severity null pointer dereference in tensorflow from tensorflow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
TensorFlow is an end-to-end open source platform for machine learning. Calling `tf.raw_ops.RaggedTensorToVariant` with arguments specifying an invalid ragged tensor results in a null pointer dereference. The implementation of `RaggedTensorToVariant` operations(https://github.com/tensorflow/tensorflow/blob/904b3926ed1c6c70380d5313d282d248a776baa1/tensorflow/core/kernels/ragged_tensor_to_variant_op.cc#L39-L40) does not validate that the ragged tensor argument is non-empty. Since `batched_ragged` contains no elements, `batched_ragged.splits` is a null vector, thus `batched_ragged.splits(0)` will result in dereferencing `nullptr`. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | tensorflow | 2.3.3 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow | 2.4.2 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow | 2.1.4 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow | 2.1.4, 2.2.3, 2.3.3, 2.4.2 | PYSEC-2021-153 |
| PyPI | tensorflow | 2.2.3 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-cpu | 2.4.2 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-cpu | 2.1.4 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-cpu | 2.2.3 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-cpu | 2.3.3 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-cpu | 2.1.4, 2.2.3, 2.3.3, 2.4.2 | PYSEC-2021-444 |
| PyPI | tensorflow-gpu | 2.3.3 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-gpu | 2.4.2 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-gpu | 2.1.4 | GHSA-84mw-34w6-2q43 |
| PyPI | tensorflow-gpu | 2.1.4, 2.2.3, 2.3.3, 2.4.2 | PYSEC-2021-642 |
| PyPI | tensorflow-gpu | 2.2.3 | GHSA-84mw-34w6-2q43 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tensorflow | tensorflow | < 2.1.4>= 2.2.0, < 2.2.3>= 2.3.0, < 2.3.3>= 2.4.0, < 2.4.2 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L