CVE-2021-29514
Severity CVSS v4.0:
Pending analysis
Type:
CWE-787
Out-of-bounds Write
Publication date:
14/05/2021
Last modified:
26/07/2021
Description
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/api_docs/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/bincount_op.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.
Impact
Base Score 3.x
7.80
Severity 3.x
HIGH
Base Score 2.0
4.60
Severity 2.0
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:* | 2.3.0 (including) | 2.3.3 (excluding) |
| cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:* | 2.4.0 (including) | 2.4.2 (excluding) |
To consult the complete list of CPE names with products and versions, see this page