Vulnerability · Published May 14, 2021 · Assigned by GitHub_M
CVE-2021-29538Division by zero in `Conv2DBackpropFilter`
Low 2.5
In plain English
A low-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 9% 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. An attacker can cause a division by zero to occur in `Conv2DBackpropFilter`. This is because the implementation(https://github.com/tensorflow/tensorflow/blob/1b0296c3b8dd9bd948f924aa8cd62f87dbb7c3da/tensorflow/core/kernels/conv_grad_filter_ops.cc#L513-L522) computes a divisor based on user provided data (i.e., the shape of the tensors given as arguments). If all shapes are empty then `work_unit_size` is 0. Since there is no check for this case before division, this results in a runtime exception, with potential to be abused for a denial of service. 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-j8qc-5fqr-52fp |
| PyPI | tensorflow | 2.4.2 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow | 2.1.4 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow | 2.2.0rc0, 2.3.0rc0, 2.3.4, 2.4.3 | PYSEC-2021-175 |
| PyPI | tensorflow | 2.2.3 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-cpu | 2.4.2 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-cpu | 2.1.4 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-cpu | 2.2.3 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-cpu | 2.3.3 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-cpu | 2.2.0rc0, 2.3.0rc0, 2.3.4, 2.4.3 | PYSEC-2021-466 |
| PyPI | tensorflow-gpu | 2.3.3 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-gpu | 2.4.2 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-gpu | 2.1.4 | GHSA-j8qc-5fqr-52fp |
| PyPI | tensorflow-gpu | 2.2.0rc0, 2.3.0rc0, 2.3.4, 2.4.3 | PYSEC-2021-664 |
| PyPI | tensorflow-gpu | 2.2.3 | GHSA-j8qc-5fqr-52fp |
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-369 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L