CVE-2021-41227— Arbitrary memory read in `ImmutableConst`
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 存在缓冲区错误漏洞，该漏洞源于 ImmutableConst 操作可以被诱骗读取任意内存内容。 这是因为 TensorFlow 字符串类（tstring）对内存映射字符串有一个特殊情况，但操作本身不提供对这种数据类型的任何支持。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-41227
Vulnerability Information
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Vulnerability Title
Arbitrary memory read in `ImmutableConst`
Source: CVE Program / CVE List V5
Vulnerability Description
TensorFlow is an open source platform for machine learning. In affected versions the `ImmutableConst` operation in TensorFlow can be tricked into reading arbitrary memory contents. This is because the `tstring` TensorFlow string class has a special case for memory mapped strings but the operation itself does not offer any support for this datatype. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, 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:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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。 Google TensorFlow 存在缓冲区错误漏洞，该漏洞源于 ImmutableConst 操作可以被诱骗读取任意内存内容。 这是因为 TensorFlow 字符串类（tstring）对内存映射字符串有一个特殊情况，但操作本身不提供对这种数据类型的任何支持。
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 | >= 2.6.0, < 2.6.1 | - |
|
II. Public POCs for CVE-2021-41227
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-41227 (2)
Vendor Advisories for CVE-2021-41227 (1)
-
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-j8c8-67vp-6mx7 x_refsource_CONFIRM
Same Patch Batch · tensorflow · 2021-11-05 · 34 CVEs total
| CVE-2021-41208 | 8.8 HIGH | Incomplete validation in boosted trees code |
| CVE-2021-41219 | 7.8 HIGH | Undefined behavior via `nullptr` reference binding in sparse matrix multiplication |
| CVE-2021-41220 | 7.8 HIGH | Use after free in `CollectiveReduceV2` |
| CVE-2021-41221 | 7.8 HIGH | Access to invalid memory during shape inference in `Cudnn*` ops |
| CVE-2021-41203 | 7.8 HIGH | Missing validation during checkpoint loading |
| CVE-2021-41201 | 7.8 HIGH | Unitialized access in `EinsumHelper::ParseEquation` |
| CVE-2021-41214 | 7.8 HIGH | Reference binding to `nullptr` in `tf.ragged.cross` |
| CVE-2021-41228 | 7.5 HIGH | Code injection in `saved_model_cli` |
| CVE-2021-41212 | 7.1 HIGH | Heap OOB read in `tf.ragged.cross` |
| CVE-2021-41205 | 7.1 HIGH | Heap OOB read in all `tf.raw_ops.QuantizeAndDequantizeV*` ops |
| CVE-2021-41210 | 7.1 HIGH | Heap OOB read in `tf.raw_ops.SparseCountSparseOutput` |
| CVE-2021-41211 | 7.1 HIGH | Heap OOB read in shape inference for `QuantizeV2` |
| CVE-2021-41226 | 7.1 HIGH | Heap OOB read in `SparseBinCount` |
| CVE-2021-41223 | 7.1 HIGH | Heap OOB read in `FusedBatchNorm` kernels |
| CVE-2021-41224 | 7.1 HIGH | `SparseFillEmptyRows` heap OOB read |
| CVE-2021-41206 | 7.0 HIGH | Incomplete validation of shapes in multiple TF ops |
| CVE-2021-41200 | 5.5 MEDIUM | Incomplete validation in `tf.summary.create_file_writer` |
| CVE-2021-41195 | 5.5 MEDIUM | Crash in `tf.math.segment_*` operations |
| CVE-2021-41197 | 5.5 MEDIUM | Crashes due to overflow and `CHECK`-fail in ops with large tensor shapes |
| CVE-2021-41198 | 5.5 MEDIUM | Overflow/crash in `tf.tile` when tiling tensor is large |
Showing top 20 of 34 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-41227
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