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CVE-2020-26268— Write to immutable memory region 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存在安全漏洞，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 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2020-26268

Vulnerability Information
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Vulnerability Title
Write to immutable memory region in TensorFlow
Source: CVE Program / CVE List V5
Vulnerability Description
In affected versions of TensorFlow the tf.raw_ops.ImmutableConst operation returns a constant tensor created from a memory mapped file which is assumed immutable. However, if the type of the tensor is not an integral type, the operation crashes the Python interpreter as it tries to write to the memory area. If the file is too small, TensorFlow properly returns an error as the memory area has fewer bytes than what is needed for the tensor it creates. However, as soon as there are enough bytes, the above snippet causes a segmentation fault. This is because the allocator used to return the buffer data is not marked as returning an opaque handle since the needed virtual method is not overridden. 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
对假设不可变数据的修改(MAID)
Source: CVE Program / CVE List V5
Vulnerability Title
Google TensorFlow 安全漏洞
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存在安全漏洞，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-2020-26268

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III. Intelligence Information for CVE-2020-26268

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Patches & Fixes for CVE-2020-26268 (1)

Vendor Advisories for CVE-2020-26268 (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-2020-26267 4.4 MEDIUM Lack of validation in data format attributes in TensorFlow
CVE-2020-26266 4.4 MEDIUM Uninitialized memory access in Eigen types 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-471

V. Comments for CVE-2020-26268

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