Vulnerability · Published Aug 12, 2021 · Assigned by GitHub_M
CVE-2021-37689Null pointer dereference in TensorFlow Lite MLIR optimizations
High 7.8
In plain English
A high-severity null pointer dereference 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 craft a TFLite model that would trigger a null pointer dereference, which would result in a crash and denial of service. This is caused by the MLIR optimization of `L2NormalizeReduceAxis` operator. The [implementation](https://github.com/tensorflow/tensorflow/blob/149562d49faa709ea80df1d99fc41d005b81082a/tensorflow/compiler/mlir/lite/transforms/optimize.cc#L67-L70) unconditionally dereferences a pointer to an iterator to a vector without checking that the vector has elements. We have patched the issue in GitHub commit d6b57f461b39fd1aa8c1b870f1b974aac3554955. 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-2021-311 |
| PyPI | tensorflow | 2.3.4 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow | 2.4.3 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow | 2.5.1 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow-cpu | 2.4.3 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow-cpu | 2.3.4, 2.4.3 | PYSEC-2021-602 |
| PyPI | tensorflow-cpu | 2.3.4 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow-cpu | 2.5.1 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow-gpu | 2.3.4, 2.4.3 | PYSEC-2021-800 |
| PyPI | tensorflow-gpu | 2.3.4 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow-gpu | 2.4.3 | GHSA-wf5p-c75w-w3wh |
| PyPI | tensorflow-gpu | 2.5.1 | GHSA-wf5p-c75w-w3wh |
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-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H