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Crash in `tf.strings.substr` due to `CHECK`-fail

Low severity GitHub Reviewed Published May 13, 2021 in tensorflow/tensorflow • Updated Feb 1, 2023

Package

pip tensorflow (pip)

Affected versions

< 2.1.4
>= 2.2.0, < 2.2.3
>= 2.3.0, < 2.3.3
>= 2.4.0, < 2.4.2

Patched versions

2.1.4
2.2.3
2.3.3
2.4.2
pip tensorflow-cpu (pip)
< 2.1.4
>= 2.2.0, < 2.2.3
>= 2.3.0, < 2.3.3
>= 2.4.0, < 2.4.2
2.1.4
2.2.3
2.3.3
2.4.2
pip tensorflow-gpu (pip)
< 2.1.4
>= 2.2.0, < 2.2.3
>= 2.3.0, < 2.3.3
>= 2.4.0, < 2.4.2
2.1.4
2.2.3
2.3.3
2.4.2

Description

Impact

An attacker can cause a denial of service via CHECK-fail in tf.strings.substr with invalid arguments:

import tensorflow as tf
tf.strings.substr(input='abc', len=1, pos=[1,-1])
import tensorflow as tf
tf.strings.substr(input='abc', len=1, pos=[1,2])

Patches

We have received a patch for the issue in GitHub commit 890f7164b70354c57d40eda52dcdd7658677c09f.

The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.

For more information

Please consult our security guide for more information regarding the security model and how to contact us with issues and questions.

Attribution

This vulnerability has been reported in #46900 and fixed in #46974.

References

@mihaimaruseac mihaimaruseac published to tensorflow/tensorflow May 13, 2021
Published by the National Vulnerability Database May 14, 2021
Reviewed May 17, 2021
Published to the GitHub Advisory Database May 21, 2021
Last updated Feb 1, 2023

Severity

Low
2.5
/ 10

CVSS base metrics

Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Weaknesses

CVE ID

CVE-2021-29617

GHSA ID

GHSA-mmq6-q8r3-48fm

Source code

No known source code
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