Vulnerability · Published Nov 5, 2021 · Assigned by GitHub_M
CVE-2021-41201Unitialized access in `EinsumHelper::ParseEquation`
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 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
TensorFlow is an open source platform for machine learning. In affeced versions during execution, `EinsumHelper::ParseEquation()` is supposed to set the flags in `input_has_ellipsis` vector and `*output_has_ellipsis` boolean to indicate whether there is ellipsis in the corresponding inputs and output. However, the code only changes these flags to `true` and never assigns `false`. This results in unitialized variable access if callers assume that `EinsumHelper::ParseEquation()` always sets these flags. 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-2021-394 |
| PyPI | tensorflow | 2.6.1 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow | 2.5.2 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow | 2.4.4 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow-cpu | 2.5.2 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow-cpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-611 |
| PyPI | tensorflow-cpu | 2.6.1 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow-cpu | 2.4.4 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow-gpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-809 |
| PyPI | tensorflow-gpu | 2.6.1 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow-gpu | 2.5.2 | GHSA-j86v-p27c-73fm |
| PyPI | tensorflow-gpu | 2.4.4 | GHSA-j86v-p27c-73fm |
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-824 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H