Vulnerability · Published Nov 5, 2021 · Assigned by GitHub_M
CVE-2021-41213Deadlock in mutually recursive `tf.function` objects
Medium 5.5
In plain English
A medium-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 affected versions the code behind `tf.function` API can be made to deadlock when two `tf.function` decorated Python functions are mutually recursive. This occurs due to using a non-reentrant `Lock` Python object. Loading any model which contains mutually recursive functions is vulnerable. An attacker can cause denial of service by causing users to load such models and calling a recursive `tf.function`, although this is not a frequent scenario. 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-2021-405 |
| PyPI | tensorflow | 2.6.1 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow | 2.5.2 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow | 2.4.4 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow-cpu | 2.5.2 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow-cpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-622 |
| PyPI | tensorflow-cpu | 2.6.1 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow-cpu | 2.4.4 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow-gpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-820 |
| PyPI | tensorflow-gpu | 2.6.1 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow-gpu | 2.5.2 | GHSA-h67m-xg8f-fxcf |
| PyPI | tensorflow-gpu | 2.4.4 | GHSA-h67m-xg8f-fxcf |
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-667 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H