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CVE-2021-37654
August 12, 2021
TensorFlow is an end-to-end open source platform for machine learning. In affected versions an attacker can trigger a crash via a `CHECK`-fail in debug builds of TensorFlow using `tf.raw_ops.ResourceGather` or a read from outside the bounds of heap allocated data in the same API in a release build. The [implementation](https://github.com/tensorflow/tensorflow/blob/f24faa153ad31a4b51578f8181d3aaab77a1ddeb/tensorflow/core/kernels/resource_variable_ops.cc#L660-L668) does not check that the `batch_dims` value that the user supplies is less than the rank of the input tensor. Since the implementation uses several for loops over the dimensions of `tensor`, this results in reading data from outside the bounds of heap allocated buffer backing the tensor. We have patched the issue in GitHub commit bc9c546ce7015c57c2f15c168b3d9201de679a1d. 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.
Affected Packages
tensorflow-cpu (PYTHON):
Affected version(s) >=2.4.0 <2.4.3
Fix Suggestion:
Update to version 2.4.3
tensorflow (PYTHON):
Affected version(s) >=2.4.0 <2.4.3
Fix Suggestion:
Update to version 2.4.3
tensorflow-cpu (PYTHON):
Affected version(s) >=0.0.0 <2.3.4
Fix Suggestion:
Update to version 2.3.4
tensorflow (PYTHON):
Affected version(s) =2.5.0 <2.5.1
Fix Suggestion:
Update to version 2.5.1
tensorflow-gpu (PYTHON):
Affected version(s) >=2.4.0 <2.4.3
Fix Suggestion:
Update to version 2.4.3
tensorflow-gpu (PYTHON):
Affected version(s) =2.5.0 <2.5.1
Fix Suggestion:
Update to version 2.5.1
tensorflow-cpu (PYTHON):
Affected version(s) =2.5.0 <2.5.1
Fix Suggestion:
Update to version 2.5.1
tensorflow-gpu (PYTHON):
Affected version(s) >=0.12.0rc0 <2.3.4
Fix Suggestion:
Update to version 2.3.4
tensorflow (PYTHON):
Affected version(s) >=0.11.0rc2 <2.3.4
Fix Suggestion:
Update to version 2.3.4
Additional Notes
The description of this vulnerability differs from MITRE.
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CVSS v4
Base Score:
7
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
HIGH
CVSS v2
Base Score:
3.6
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
Weakness Type (CWE)
Out-of-bounds Read
EPSS
Base Score:
0.04