7.8

CVSS Score

3.1

Basic Information

CVE ID

CVE-2021-37671

GHSA ID

GHSA-qr82-2c78-4m8h

EPSS Score

0.00931%

CWE

CWE-824

Published

8/25/2021

Updated

11/13/2024

KEV Status

Technology

Python

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CVE-2021-37671

CVE-2021-37671:
Reference binding to nullptr in map operations

Impact

An attacker can cause undefined behavior via binding a reference to null pointer in tf.raw_ops.Map* and tf.raw_ops.OrderedMap* operations:

import tensorflow as tf
  
tf.raw_ops.MapPeek(
  key=tf.constant([8],dtype=tf.int64),
  indices=[],
  dtypes=[tf.int32],
  capacity=8,
  memory_limit=128)

The implementation has a check in place to ensure that indices is in ascending order, but does not check that indices is not empty.

Patches

We have patched the issue in GitHub commit 532f5c5a547126c634fefd43bbad1dc6417678ac.

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.

For more information

Please consult our security guide for more information regarding the security model and how to contact us with issues and questions.

Attribution

This vulnerability has been reported by members of the Aivul Team from Qihoo 360.

(GitHub Advisory)

7.8

CVSS Score

3.1

Basic Information

CVE ID

CVE-2021-37671

GHSA ID

GHSA-qr82-2c78-4m8h

EPSS Score

0.00931%

CWE

CWE-824

Published

8/25/2021

Updated

11/13/2024

KEV Status

Technology

Python

Technical Details

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
tensorflow	pip	< 2.3.4	2.3.4
tensorflow	pip	>= 2.4.0, < 2.4.3	2.4.3
tensorflow	pip	= 2.5.0	2.5.1
tensorflow-cpu	pip	< 2.3.4	2.3.4
tensorflow-cpu	pip	>= 2.4.0, < 2.4.3	2.4.3
tensorflow-cpu	pip	= 2.5.0	2.5.1
tensorflow-gpu	pip	< 2.3.4	2.3.4
tensorflow-gpu	pip	>= 2.4.0, < 2.4.3	2.4.3
tensorflow-gpu	pip	= 2.5.0	2.5.1

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from the check_index_ordering function in map_stage_op.cc. The original implementation validated that indices were in ascending order but did not check for empty indices. The patch explicitly adds a check for indices.NumElements() == 0 to prevent null pointer dereference. This function is directly referenced in the vulnerability description and commit diff, making it the clear vulnerable entry point.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

### Imp**t *n *tt**k*r **n **us* un***in** ****vior vi* *in*in* * r***r*n** to null point*r in `t*.r*w_ops.M*p*` *n* `t*.r*w_ops.Or**r**M*p*` op*r*tions: ```pyt*on import t*nsor*low *s t* t*.r*w_ops.M*pP**k( k*y=t*.*onst*nt([*],*typ*=t*.int**),

Reasoning

T** vuln*r**ility st*ms *rom t** ****k_in**x_or**rin* *un*tion in m*p_st***_op.**. T** ori*in*l impl*m*nt*tion v*li**t** t**t in*i**s w*r* in *s**n*in* or**r *ut *i* not ****k *or *mpty in*i**s. T** p*t** *xpli*itly ***s * ****k *or in*i**s.Num*l*m*n

7.8

Basic Information

Concerned about an active attack path?

CVE-2021-37671: Reference binding to nullptr in map operations

Impact

Patches

For more information

Attribution

7.8

Basic Information

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

CVE-2021-37671:
Reference binding to nullptr in map operations

Vulnerability Intelligence
Miggo AI