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CVE-2021-37645— Integer overflow due to conversion to unsigned in TensorFlow

Quick assessment

Affected
tensorflow tensorflow
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google TensorFlow是美国谷歌（Google）公司的一套用于机器学习的端到端开源平台。 Google TensorFlow存在数字错误漏洞，该漏洞源于在受影响的版本中，“tf.raw_ops.QuantizeAndDequantizeV4Grad”的实现容易受到整数溢出问题的攻击，这是由于将有符号整数值转换为无符号整数值，然后根据该值分配内存而导致的。

CVSS 5.5 · Medium EPSS 0.15% · P5

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-37645

Vulnerability Information
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Vulnerability Title
Integer overflow due to conversion to unsigned in TensorFlow
Source: CVE Program / CVE List V5
Vulnerability Description
TensorFlow is an end-to-end open source platform for machine learning. In affected versions the implementation of `tf.raw_ops.QuantizeAndDequantizeV4Grad` is vulnerable to an integer overflow issue caused by converting a signed integer value to an unsigned one and then allocating memory based on this value. The [implementation](https://github.com/tensorflow/tensorflow/blob/8d72537c6abf5a44103b57b9c2e22c14f5f49698/tensorflow/core/kernels/quantize_and_dequantize_op.cc#L126) uses the `axis` value as the size argument to `absl::InlinedVector` constructor. But, the constructor uses an unsigned type for the argument, so the implicit conversion transforms the negative value to a large integer. We have patched the issue in GitHub commit 96f364a1ca3009f98980021c4b32be5fdcca33a1. The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, and TensorFlow 2.4.3, as these are also affected and still in supported range.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
数值类型间的不正确转换
Source: CVE Program / CVE List V5
Vulnerability Title
Google TensorFlow 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google TensorFlow是美国谷歌（Google）公司的一套用于机器学习的端到端开源平台。 Google TensorFlow存在数字错误漏洞，该漏洞源于在受影响的版本中，“tf.raw_ops.QuantizeAndDequantizeV4Grad”的实现容易受到整数溢出问题的攻击，这是由于将有符号整数值转换为无符号整数值，然后根据该值分配内存而导致的。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tensorflow tensorflow >= 2.5.0, < 2.5.1 -

II. Public POCs for CVE-2021-37645

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III. Intelligence Information for CVE-2021-37645

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Patches & Fixes for CVE-2021-37645 (1)

Vendor Advisories for CVE-2021-37645 (1)

Same Patch Batch · tensorflow · 2021-08-12 · 58 CVEs total

CVE-2021-37678 9.3 CRITICAL Arbitrary code execution due to YAML deserialization
CVE-2021-37639 8.4 HIGH Null pointer dereference and heap OOB read in TensorFlow
CVE-2021-37689 7.8 HIGH Null pointer dereference in TensorFlow Lite MLIR optimizations
CVE-2021-37665 7.8 HIGH Incomplete validation in MKL requantization in TensorFlow
CVE-2021-37663 7.8 HIGH Incomplete validation in `QuantizeV2` in TensorFlow
CVE-2021-37681 7.8 HIGH Null pointer exception in TensorFlow Lite
CVE-2021-37667 7.8 HIGH Reference binding to nullptr in unicode encoding in TensorFlow
CVE-2021-37688 7.8 HIGH Null pointer dereference in TensorFlow Lite
CVE-2021-37676 7.8 HIGH Reference binding to nullptr in shape inference in TensorFlow
CVE-2021-37671 7.8 HIGH Reference binding to nullptr in map operations in TensorFlow
CVE-2021-37666 7.8 HIGH Reference binding to nullptr in `RaggedTensorToVariant` in TensorFlow
CVE-2021-37648 7.8 HIGH Incorrect validation of `SaveV2` inputs in TensorFlow
CVE-2021-37652 7.8 HIGH Use after free in boosted trees creation in TensorFlow
CVE-2021-37650 7.8 HIGH Segfault and heap buffer overflow in `{Experimental,}DatasetToTFRecord` in TensorFlow
CVE-2021-37643 7.7 HIGH Null pointer dereference in `MatrixDiagPartOp` in TensorFlow
CVE-2021-37637 7.7 HIGH Null pointer dereference in `CompressElement` in TensorFlow
CVE-2021-37649 7.7 HIGH Null pointer dereference in `UncompressElement` in TensorFlow
CVE-2021-37647 7.7 HIGH Null pointer dereference in `SparseTensorSliceDataset` in TensorFlow
CVE-2021-37638 7.7 HIGH Null pointer dereference in `RaggedTensorToTensor` in TensorFlow
CVE-2021-37659 7.3 HIGH Out of bounds read via null pointer dereference in TensorFlow

Showing top 20 of 58 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: tensorflow
Same vendor: tensorflow
Same weakness: CWE-681

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