Vulnerability Details : CVE-2021-37643
TensorFlow is an end-to-end open source platform for machine learning. If a user does not provide a valid padding value to `tf.raw_ops.MatrixDiagPartOp`, then the code triggers a null pointer dereference (if input is empty) or produces invalid behavior, ignoring all values after the first. The [implementation](https://github.com/tensorflow/tensorflow/blob/8d72537c6abf5a44103b57b9c2e22c14f5f49698/tensorflow/core/kernels/linalg/matrix_diag_op.cc#L89) reads the first value from a tensor buffer without first checking that the tensor has values to read from. We have patched the issue in GitHub commit 482da92095c4d48f8784b1f00dda4f81c28d2988. 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.
Vulnerability category: Memory Corruption
Exploit prediction scoring system (EPSS) score for CVE-2021-37643
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 10 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-37643
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
3.6
|
LOW | AV:L/AC:L/Au:N/C:N/I:P/A:P |
3.9
|
4.9
|
NIST |
7.1
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
1.8
|
5.2
|
NIST |
7.7
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
2.5
|
5.2
|
GitHub, Inc. |
CWE ids for CVE-2021-37643
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A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.Assigned by: security-advisories@github.com (Primary)
References for CVE-2021-37643
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https://github.com/tensorflow/tensorflow/security/advisories/GHSA-fcwc-p4fc-c5cc
Null pointer dereference in `MatrixDiagPartOp` · Advisory · tensorflow/tensorflow · GitHubThird Party Advisory
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https://github.com/tensorflow/tensorflow/commit/482da92095c4d48f8784b1f00dda4f81c28d2988
Ensure non-empty padding_value input to tf.raw_ops.MatrixDiagPartV2, … · tensorflow/tensorflow@482da92 · GitHubPatch;Third Party Advisory
Products affected by CVE-2021-37643
- cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*
- cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*
- cpe:2.3:a:google:tensorflow:2.5.0:*:*:*:*:*:*:*
- cpe:2.3:a:google:tensorflow:2.6.0:rc0:*:*:*:*:*:*
- cpe:2.3:a:google:tensorflow:2.6.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:google:tensorflow:2.6.0:rc2:*:*:*:*:*:*