Vulnerability · Published Aug 12, 2021 · Assigned by GitHub_M
CVE-2021-37667Reference binding to nullptr in unicode encoding in TensorFlow
High 7.8
In plain English
A high-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 7% 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 an attacker can cause undefined behavior via binding a reference to null pointer in `tf.raw_ops.UnicodeEncode`. The [implementation](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/core/kernels/unicode_ops.cc#L533-L539) reads the first dimension of the `input_splits` tensor before validating that this tensor is not empty. We have patched the issue in GitHub commit 2e0ee46f1a47675152d3d865797a18358881d7a6. 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-2021-289 |
| PyPI | tensorflow | 2.3.4 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow | 2.4.3 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow | 2.5.1 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow-cpu | 2.4.3 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow-cpu | 2.3.4, 2.4.3 | PYSEC-2021-580 |
| PyPI | tensorflow-cpu | 2.3.4 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow-cpu | 2.5.1 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow-gpu | 2.3.4, 2.4.3 | PYSEC-2021-778 |
| PyPI | tensorflow-gpu | 2.3.4 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow-gpu | 2.4.3 | GHSA-w74j-v8xh-3w5h |
| PyPI | tensorflow-gpu | 2.5.1 | GHSA-w74j-v8xh-3w5h |
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-824 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H