CVE-2021-29514

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Source
https://cve.org/CVERecord?id=CVE-2021-29514
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29514.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-29514
Aliases
Related
Published
2021-05-14T20:15:11.247Z
Modified
2026-02-04T21:34:50.813524Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

TensorFlow is an end-to-end open source platform for machine learning. If the splits argument of RaggedBincount does not specify a valid SparseTensor(https://www.tensorflow.org/apidocs/python/tf/sparse/SparseTensor), then an attacker can trigger a heap buffer overflow. This will cause a read from outside the bounds of the splits tensor buffer in the implementation of the RaggedBincount op(https://github.com/tensorflow/tensorflow/blob/8b677d79167799f71c42fd3fa074476e0295413a/tensorflow/core/kernels/bincountop.cc#L430-L446). Before the for loop, batch_idx is set to 0. The attacker sets splits(0) to be 7, hence the while loop does not execute and batch_idx remains 0. This then results in writing to out(-1, bin), which is before the heap allocated buffer for the output tensor. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2 and TensorFlow 2.3.3, as these are also affected.

References

Affected packages

Git / github.com/tensorflow/tensorflow

Affected ranges

Type
GIT
Repo
https://github.com/tensorflow/tensorflow
Events
Introduced
582c8d236cb079023657287c318ff26adb239002
Fixed
1923123d32ea41d92b70a27a3f6ecf0763b56f6c
Introduced
b36436b087bd8e8701ef51718179037cccdfc26e
Fixed
3929ffacfbef7c431e8397920d040aaf47acff19
Fixed
eebb96c2830d48597d055d247c0e9aebaea94cd5

Database specific

vanir_signatures 
[
    {
        "target": {
            "file": "tensorflow/core/kernels/bincount_op.cc"
        },
        "id": "CVE-2021-29514-e78c135e",
        "source": "https://github.com/tensorflow/tensorflow/commit/eebb96c2830d48597d055d247c0e9aebaea94cd5",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
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            ]
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29514.json"