Vulnerability · Published Aug 12, 2021 · Assigned by GitHub_M
CVE-2021-37643Null pointer dereference in `MatrixDiagPartOp` in TensorFlow
High 7.7
In plain English
A high-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 5% 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. If a user does not provide a valid padding value to `tf.raw_ops.MatrixDiagPartOp`, then the code triggers a null pointer dereference (if input is empty) or produces invalid behavior, ignoring all values after the first. The [implementation](https://github.com/tensorflow/tensorflow/blob/8d72537c6abf5a44103b57b9c2e22c14f5f49698/tensorflow/core/kernels/linalg/matrix_diag_op.cc#L89) reads the first value from a tensor buffer without first checking that the tensor has values to read from. We have patched the issue in GitHub commit 482da92095c4d48f8784b1f00dda4f81c28d2988. The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | tensorflow | 2.3.4, 2.4.3 | PYSEC-2021-265 |
| PyPI | tensorflow | 2.3.4 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow | 2.4.3 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow | 2.5.1 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow-cpu | 2.4.3 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow-cpu | 2.3.4, 2.4.3 | PYSEC-2021-556 |
| PyPI | tensorflow-cpu | 2.3.4 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow-cpu | 2.5.1 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow-gpu | 2.3.4, 2.4.3 | PYSEC-2021-754 |
| PyPI | tensorflow-gpu | 2.3.4 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow-gpu | 2.4.3 | GHSA-fcwc-p4fc-c5cc |
| PyPI | tensorflow-gpu | 2.5.1 | GHSA-fcwc-p4fc-c5cc |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tensorflow | tensorflow | >= 2.5.0, < 2.5.1>= 2.4.0, < 2.4.3< 2.3.4 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H