Vulnerability · Published Aug 12, 2021 · Assigned by GitHub_M
CVE-2021-37645Integer overflow due to conversion to unsigned in TensorFlow
Medium 5.5
In plain English
A medium-severity security flaw 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 4% 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. In affected versions the implementation of `tf.raw_ops.QuantizeAndDequantizeV4Grad` is vulnerable to an integer overflow issue caused by converting a signed integer value to an unsigned one and then allocating memory based on this value. The [implementation](https://github.com/tensorflow/tensorflow/blob/8d72537c6abf5a44103b57b9c2e22c14f5f49698/tensorflow/core/kernels/quantize_and_dequantize_op.cc#L126) uses the `axis` value as the size argument to `absl::InlinedVector` constructor. But, the constructor uses an unsigned type for the argument, so the implicit conversion transforms the negative value to a large integer. We have patched the issue in GitHub commit 96f364a1ca3009f98980021c4b32be5fdcca33a1. The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, and TensorFlow 2.4.3, 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-2021-267 |
| PyPI | tensorflow | 2.4.3 | GHSA-9w2p-5mgw-p94c |
| PyPI | tensorflow | 2.5.1 | GHSA-9w2p-5mgw-p94c |
| PyPI | tensorflow-cpu | 2.3.4, 2.4.3 | PYSEC-2021-558 |
| PyPI | tensorflow-cpu | 2.5.1 | GHSA-9w2p-5mgw-p94c |
| PyPI | tensorflow-cpu | 2.4.3 | GHSA-9w2p-5mgw-p94c |
| PyPI | tensorflow-gpu | 2.3.4, 2.4.3 | PYSEC-2021-756 |
| PyPI | tensorflow-gpu | 2.4.3 | GHSA-9w2p-5mgw-p94c |
| PyPI | tensorflow-gpu | 2.5.1 | GHSA-9w2p-5mgw-p94c |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tensorflow | tensorflow | >= 2.5.0, < 2.5.1< 2.4.3 |
Weakness: CWE-681 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H