Vulnerability · Published Aug 12, 2021 · Assigned by GitHub_M
CVE-2021-37670Heap OOB in `UpperBound` and `LowerBound` in TensorFlow
Medium 5.5
In plain English
A medium-severity out-of-bounds read 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 6% 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 read from outside of bounds of heap allocated data by sending specially crafted illegal arguments to `tf.raw_ops.UpperBound`. The [implementation](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/core/kernels/searchsorted_op.cc#L85-L104) does not validate the rank of `sorted_input` argument. A similar issue occurs in `tf.raw_ops.LowerBound`. We have patched the issue in GitHub commit 42459e4273c2e47a3232cc16c4f4fff3b3a35c38. 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-2021-292 |
| PyPI | tensorflow | 2.3.4 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow | 2.4.3 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow | 2.5.1 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow-cpu | 2.4.3 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow-cpu | 2.3.4, 2.4.3 | PYSEC-2021-583 |
| PyPI | tensorflow-cpu | 2.3.4 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow-cpu | 2.5.1 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow-gpu | 2.3.4, 2.4.3 | PYSEC-2021-781 |
| PyPI | tensorflow-gpu | 2.3.4 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow-gpu | 2.4.3 | GHSA-9697-98pf-4rw7 |
| PyPI | tensorflow-gpu | 2.5.1 | GHSA-9697-98pf-4rw7 |
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-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N