CVE-2021-37667
August 12, 2021
TensorFlow is an end-to-end open source platform for machine learning. In affected versions an attacker can cause undefined behavior via binding a reference to null pointer in "tf.raw_ops.UnicodeEncode". The "implementation" (https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/core/kernels/unicode_ops.cc#L533-L539) reads the first dimension of the "input_splits" tensor before validating that this tensor is not empty. We have patched the issue in GitHub commit 2e0ee46f1a47675152d3d865797a18358881d7a6. 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) =2.5.0 <2.5.1Fix Suggestion:
Update to version 2.5.1tensorflow (PYTHON):
Affected version(s) >=2.4.0 <2.4.3Fix Suggestion:
Update to version 2.4.3tensorflow (PYTHON):
Affected version(s) >=0.11.0rc2 <2.3.4Fix Suggestion:
Update to version 2.3.4tensorflow-cpu (PYTHON):
Affected version(s) >=2.4.0 <2.4.3Fix Suggestion:
Update to version 2.4.3tensorflow-gpu (PYTHON):
Affected version(s) >=2.4.0 <2.4.3Fix Suggestion:
Update to version 2.4.3tensorflow-gpu (PYTHON):
Affected version(s) >=0.12.0rc0 <2.3.4Fix Suggestion:
Update to version 2.3.4tensorflow-gpu (PYTHON):
Affected version(s) =2.5.0 <2.5.1Fix Suggestion:
Update to version 2.5.1tensorflow (PYTHON):
Affected version(s) =2.5.0 <2.5.1Fix Suggestion:
Update to version 2.5.1tensorflow-cpu (PYTHON):
Affected version(s) >=0.0.0 <2.3.4Fix Suggestion:
Update to version 2.3.4Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
CVSS v2
Base Score:
4.6
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Weakness Type (CWE)
Access of Uninitialized Pointer
EPSS
Base Score:
0.01
