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CVE-2020-26266— Uninitialized memory access in Eigen types 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。 TensorFlow存在缓冲区错误漏洞，该漏洞源于张量缓冲区填充了该类型的默认值，却忘记了默认初始化Eigen中的量化浮点类型。攻击者可利用该漏洞导致缓冲区溢出。以下产品及版本受到影响：1.15.5、2.0.4、2.1.3、2.2.2、2.3.2、2.4.0。

CVSS 4.4 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-26266

Vulnerability Information
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Vulnerability Title
Uninitialized memory access in Eigen types in TensorFlow
Source: CVE Program / CVE List V5
Vulnerability Description
In affected versions of TensorFlow under certain cases a saved model can trigger use of uninitialized values during code execution. This is caused by having tensor buffers be filled with the default value of the type but forgetting to default initialize the quantized floating point types in Eigen. This is fixed in versions 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2, and 2.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对未经初始化资源的使用
Source: CVE Program / CVE List V5
Vulnerability Title
Google TensorFlow 缓冲区错误漏洞
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。 TensorFlow存在缓冲区错误漏洞，该漏洞源于张量缓冲区填充了该类型的默认值，却忘记了默认初始化Eigen中的量化浮点类型。攻击者可利用该漏洞导致缓冲区溢出。以下产品及版本受到影响：1.15.5、2.0.4、2.1.3、2.2.2、2.3.2、2.4.0。
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 < 1.15.5 -

II. Public POCs for CVE-2020-26266

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III. Intelligence Information for CVE-2020-26266

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Patches & Fixes for CVE-2020-26266 (1)

Vendor Advisories for CVE-2020-26266 (1)

Same Patch Batch · tensorflow · 2020-12-10 · 6 CVEs total

CVE-2020-26271 4.4 MEDIUM Heap out of bounds access in MakeEdge in TensorFlow
CVE-2020-26270 4.4 MEDIUM CHECK-fail in LSTM with zero-length input in TensorFlow
CVE-2020-26268 4.4 MEDIUM Write to immutable memory region in TensorFlow
CVE-2020-26267 4.4 MEDIUM Lack of validation in data format attributes in TensorFlow
CVE-2020-26269 Heap out of bounds read in filesystem glob matching in TensorFlow

IV. Related Vulnerabilities

Same product: tensorflow
Same vendor: tensorflow
Same weakness: CWE-908

V. Comments for CVE-2020-26266

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