CVE-2021-37656 - Reference binding to nullptr in `RaggedTensorToSparse` in TensorFlow

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MEDIUM

Reference binding to nullptr in `RaggedTensorToSparse` in TensorFlow

Published Aug 12, 2021

6.9

MEDIUM

CVSS 4.0

EPSS 0.17%

Description

TensorFlow is an end-to-end open source platform for machine learning. In affected versions an attacker can cause undefined behavior via binding a reference to null pointer in `tf.raw_ops.RaggedTensorToSparse`. The [implementation](https://github.com/tensorflow/tensorflow/blob/f24faa153ad31a4b51578f8181d3aaab77a1ddeb/tensorflow/core/kernels/ragged_tensor_to_sparse_kernel.cc#L30) has an incomplete validation of the splits values: it does not check that they are in increasing order. We have patched the issue in GitHub commit 1071f554dbd09f7e101324d366eec5f4fe5a3ece. 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 products

Vendor TensorFlow Product TensorFlow Default
n/a
- Version
  < 2.3.4
  Status
  affected
  Constraints
  -
- Version
  >= 2.4.0, < 2.4.3
  Status
  affected
  Constraints
  -
- Version
  >= 2.5.0, < 2.5.1
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

TensorFlow

n/a

Version	Status	Constraints
< 2.3.4	affected	-
>= 2.4.0, < 2.4.3	affected	-
>= 2.5.0, < 2.5.1	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-824

References (8)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-0382
Advisory
https://github.com/advisories/GHSA-4xfp-4pfp-89wg
Advisory
https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2021-569.yaml
https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2021-767.yaml
https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2021-278.yaml
https://github.com/tensorflow/tensorflow/commit/1071f554dbd09f7e101324d366eec5f4fe5a3ece
x_refsource_MISCPatchThird Party Advisory
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-4xfp-4pfp-89wg
x_refsource_CONFIRMThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-37656

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-0382		Advisory
https://github.com/advisories/GHSA-4xfp-4pfp-89wg		Advisory
https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2021-569.yaml
https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2021-767.yaml
https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2021-278.yaml
https://github.com/tensorflow/tensorflow/commit/1071f554dbd09f7e101324d366eec5f4fe5a3ece		x_refsource_MISCPatchThird Party Advisory
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-4xfp-4pfp-89wg		x_refsource_CONFIRMThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-37656