Safety vulnerability ID: 40466
The information on this page was manually curated by our Cybersecurity Intelligence Team.
Tensorflow 2.1.4, 2.2.3, 2.3.3, 2.4.2, and 2.5.0 include a fix for CVE-2021-29514: 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.
Latest version: 2.18.0
TensorFlow is an open source machine learning framework for everyone.
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. See CVE-2021-29514.
CONFIRM:https://github.com/tensorflow/tensorflow/security/advisories/GHSA-8h46-5m9h-7553: https://github.com/tensorflow/tensorflow/security/advisories/GHSA-8h46-5m9h-7553
MISC:https://github.com/tensorflow/tensorflow/commit/eebb96c2830d48597d055d247c0e9aebaea94cd5: https://github.com/tensorflow/tensorflow/commit/eebb96c2830d48597d055d247c0e9aebaea94cd5
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