Vulnerability · Published Aug 12, 2021 · Assigned by GitHub_M
CVE-2021-37635Heap out of bounds access in sparse reduction operations in TensorFlow
High 7.3
In plain English
A high-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 the implementation of sparse reduction operations in TensorFlow can trigger accesses outside of bounds of heap allocated data. The [implementation](https://github.com/tensorflow/tensorflow/blob/a1bc56203f21a5a4995311825ffaba7a670d7747/tensorflow/core/kernels/sparse_reduce_op.cc#L217-L228) fails to validate that each reduction group does not overflow and that each corresponding index does not point to outside the bounds of the input tensor. We have patched the issue in GitHub commit 87158f43f05f2720a374f3e6d22a7aaa3a33f750. 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-2021-257 |
| PyPI | tensorflow | 2.3.4 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow | 2.4.3 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow | 2.5.1 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow-cpu | 2.4.3 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow-cpu | 2.3.4, 2.4.3 | PYSEC-2021-548 |
| PyPI | tensorflow-cpu | 2.3.4 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow-cpu | 2.5.1 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow-gpu | 2.3.4, 2.4.3 | PYSEC-2021-746 |
| PyPI | tensorflow-gpu | 2.3.4 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow-gpu | 2.4.3 | GHSA-cgfm-62j4-v4rf |
| PyPI | tensorflow-gpu | 2.5.1 | GHSA-cgfm-62j4-v4rf |
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:L/A:H