Advisoriesby IbisUninitialized variable access in Tensorflow
Impact
The [implementation of AssignOp](https://github.com/tensorflow/tensorflow/blob/a1320ec1eac186da1d03f033109191f715b2b130/tensorflow/core/kernels/assign_op.h#L30-L143) can result in copying unitialized data to a new tensor. This later results in undefined behavior.
The implementation has a check that the left hand side of the assignment is initialized (to minimize number of allocations), but does not check that the right hand side is also initialized.
Patches
We have patched the issue in GitHub commit [ef1d027be116f25e25bb94a60da491c2cf55bd0b](https://github.com/tensorflow/tensorflow/commit/ef1d027be116f25e25bb94a60da491c2cf55bd0b).
The fix will be included in TensorFlow 2.8.0. We will also cherrypick this commit on TensorFlow 2.7.1, TensorFlow 2.6.3, and TensorFlow 2.5.3, as these are also affected and still in supported range.
For more information
Please consult [our security guide](https://github.com/tensorflow/tensorflow/blob/master/SECURITY.md) for more information regarding the security model and how to contact us with issues and questions.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| tensorflow PyPI | < 2.5.3 | 2.5.3 |
| >= 2.6.0, < 2.6.3 | 2.6.3 | |
| >= 2.7.0, < 2.7.1 | 2.7.1 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-908
- Also known as
- BIT-tensorflow-2022-23573, CVE-2022-23573, PYSEC-2022-137, PYSEC-2022-82, PYSEC-2026-3229
- github.com/tensorflow/tensorflow/security/advisories/GHSA-q85f-69q7-55h2
- nvd.nist.gov/vuln/detail/CVE-2022-23573
- github.com/tensorflow/tensorflow/commit/ef1d027be116f25e25bb94a60da491c2cf55bd0b
- github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2022-82.yaml
- github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2022-137.yaml
- github.com/tensorflow/tensorflow
- github.com/tensorflow/tensorflow/blob/a1320ec1eac186da1d03f033109191f715b2b130/tensorflow/core/kernels/assign_op.h#L30-L143
More TensorFlow advisories
All TensorFlow
Use after free in `DecodePng` kernelCVE-2022-23584fixed in 2.5.3 +2Out of bounds write in TensorflowCVE-2022-23566fixed in 2.5.3 +2Reachable Assertion in TensorflowCVE-2022-23564fixed in 2.5.3 +2Insecure temporary file in TensorflowCVE-2022-23563fixed in 2.5.3 +2Integer overflow in TensorflowCVE-2022-23562fixed in 2.5.3 +2Out of bounds write in TFLiteCVE-2022-23561fixed in 2.5.3 +2