Float cast overflow undefined behavior
### Impact When the `boxes` argument of `tf.image.crop_and_resize` has a very large value, the CPU kernel implementation receives it as a C++ `nan` floating point value. Attempting to operate on this is undefined behavior which later produces a segmentation fault. ### Patches We have patched the issue in c0319231333f0f16e1cc75ec83660b01fedd4182 and will release TensorFlow 2.4.0 containing the patch. TensorFlow nightly packages after this commit will also have the issue resolved. ### 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. ### Attribution This vulnerability has been reported in #42129
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-15266US | high7.5 | — | ||
In Tensorflow before version 2.4.0, when the `boxes` argument of `tf.image.crop_and_resize` has a very large value, the CPU kernel implementation receives it as a C++ `nan` floatin… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2020-296.yamlWEB
- https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2020-331.yamlWEB
- https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2020-139.yamlWEB
- https://github.com/tensorflow/tensorflowPACKAGE
- https://github.com/tensorflow/tensorflow/issues/42129WEB
- https://github.com/tensorflow/tensorflow/pull/42143/commits/3ade2efec2e90c6237de32a19680caaa3ebc2845WEB
- https://github.com/tensorflow/tensorflow/security/advisories/GHSA-xwhf-g6j5-j5gcWEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-15266ADVISORY
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