CVE-2021-37662

Reference binding to nullptr in boosted trees in TensorFlow

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

TensorFlow es una plataforma de código abierto de extremo a extremo para el aprendizaje automático. En las versiones afectadas un atacante puede generar un comportamiento indefinido por medio de un enlace de referencia a nullptr en "BoostedTreesCalculateBestGainsPerFeature" y un ataque similar puede ocurrir en "BoostedTreesCalculateBestFeatureSplitV2". La [implementación](https://github.com/tensorflow/tensorflow/blob/84d053187cb80d975ef2b9684d4b61981bca0c41/tensorflow/core/kernels/boosted_trees/stats_ops.cc) no comprueba los valores de entrada. Hemos parcheado el problema en el commit de GitHub 9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad y en el commit 429f009d2b2c09028647dd4bb7b3f6f414bbaad7. La corrección será incluida en TensorFlow versión 2.6.0. También seleccionaremos este commit en TensorFlow versión 2.5.1, TensorFlow versión 2.4.3, y TensorFlow versión 2.3.4, ya que estos también están afectados y todavía están en el rango de soporte.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-29 CVE Reserved
2021-08-12 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-824: Access of Uninitialized Pointer

CAPEC

References (3)

URL	Tag	Source
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-f5cx-5wr3-5qrc	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/tensorflow/tensorflow/commit/429f009d2b2c09028647dd4bb7b3f6f414bbaad7	2021-08-18
https://github.com/tensorflow/tensorflow/commit/9c87c32c710d0b5b53dc6fd3bfde4046e1f7a5ad	2021-08-18

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Google Search vendor "Google"		Tensorflow Search vendor "Google" for product "Tensorflow"				>= 2.3.0 < 2.3.4 Search vendor "Google" for product "Tensorflow" and version " >= 2.3.0 < 2.3.4"		-		Affected
Google Search vendor "Google"		Tensorflow Search vendor "Google" for product "Tensorflow"				>= 2.4.0 < 2.4.3 Search vendor "Google" for product "Tensorflow" and version " >= 2.4.0 < 2.4.3"		-		Affected
Google Search vendor "Google"		Tensorflow Search vendor "Google" for product "Tensorflow"				2.5.0 Search vendor "Google" for product "Tensorflow" and version "2.5.0"		-		Affected
Google Search vendor "Google"		Tensorflow Search vendor "Google" for product "Tensorflow"				2.6.0 Search vendor "Google" for product "Tensorflow" and version "2.6.0"		rc0		Affected
Google Search vendor "Google"		Tensorflow Search vendor "Google" for product "Tensorflow"				2.6.0 Search vendor "Google" for product "Tensorflow" and version "2.6.0"		rc1		Affected
Google Search vendor "Google"		Tensorflow Search vendor "Google" for product "Tensorflow"				2.6.0 Search vendor "Google" for product "Tensorflow" and version "2.6.0"		rc2		Affected