Vulnerability · Published Nov 5, 2021 · Assigned by GitHub_M
CVE-2021-41217Null pointer exception when `Exit` node is not preceded by `Enter` op
Medium 5.5
In plain English
A medium-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 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
TensorFlow is an open source platform for machine learning. In affected versions the process of building the control flow graph for a TensorFlow model is vulnerable to a null pointer exception when nodes that should be paired are not. This occurs because the code assumes that the first node in the pairing (e.g., an `Enter` node) always exists when encountering the second node (e.g., an `Exit` node). When this is not the case, `parent` is `nullptr` so dereferencing it causes a crash. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | tensorflow | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-409 |
| PyPI | tensorflow | 2.6.1 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow | 2.5.2 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow | 2.4.4 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow-cpu | 2.5.2 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow-cpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-626 |
| PyPI | tensorflow-cpu | 2.6.1 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow-cpu | 2.4.4 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow-gpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-824 |
| PyPI | tensorflow-gpu | 2.6.1 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow-gpu | 2.5.2 | GHSA-5crj-c72x-m7gq |
| PyPI | tensorflow-gpu | 2.4.4 | GHSA-5crj-c72x-m7gq |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tensorflow | tensorflow | >= 2.6.0, < 2.6.1>= 2.5.0, < 2.5.2< 2.4.4 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H