CVE-2021-37662
Reference binding to nullptr in boosted trees
Description
TensorFlow is an end-to-end open source platform for machine learning. In affected versions an attacker can generate undefined behavior via a reference binding to nullptr in `BoostedTreesCalculateBestGainsPerFeature` and similar attack can occur in `BoostedTreesCalculateBestFeatureSplitV2`. The [implementation](https://github.com/tensorflow/tensorflow/blob/84d053187cb80d975ef2b9684d4b61981bca0c41/tensorflow/core/kernels/boosted_trees/stats_ops.cc) does not validate the input values. We have patched the issue in GitHub commit 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad and in commit 429f009d2b2c09028647dd4bb7b3f6f414bbaad7. 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.
How to fix CVE-2021-37662
To remediate CVE-2021-37662, upgrade the affected package to a fixed version below.
- —upgrade to 2.3.4 or later
- —upgrade to 2.3.4 or later
- —upgrade to 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad or later
- —upgrade to 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad or later
- —upgrade to 2.3.4 or later
- —upgrade to 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad or later
- —upgrade to 2.3.4 or later
Is CVE-2021-37662 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (7)
- >= 2.3.0, < 2.3.4, >= 2.4.0, < 2.4.3, >= 2.5.0, < 2.5.1
- from 0, < 2.3.4
- from 0, < 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad, < 429f009d2b2c09028647dd4bb7b3f6f414bbaad7 | >= 2.3.0, < 2.3.4, >= 2.4.0, < 2.4.3
- from 0, < 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad, < 429f009d2b2c09028647dd4bb7b3f6f414bbaad7 | >= 2.3.0, < 2.3.4, >= 2.4.0, < 2.4.3
- from 0, < 2.3.4
- from 0, < 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad, < 429f009d2b2c09028647dd4bb7b3f6f414bbaad7 | >= 2.3.0, < 2.3.4, >= 2.4.0, < 2.4.3
- from 0, < 2.3.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |