CVE-2021-29609

Vulnerability Description

TensorFlow is an end-to-end open source platform for machine learning. Incomplete validation in `SparseAdd` results in allowing attackers to exploit undefined behavior (dereferencing null pointers) as well as write outside of bounds of heap allocated data. The implementation(https://github.com/tensorflow/tensorflow/blob/656e7673b14acd7835dc778867f84916c6d1cac2/tensorflow/core/kernels/sparse_add_op.cc) has a large set of validation for the two sparse tensor inputs (6 tensors in total), but does not validate that the tensors are not empty or that the second dimension of `*_indices` matches the size of corresponding `*_shape`. This allows attackers to send tensor triples that represent invalid sparse tensors to abuse code assumptions that are not protected by validation. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• https://github.com/tensorflow/tensorflow/commit/41727ff06111117bdf86b37db198217fPatchThird Party Advisory
• https://github.com/tensorflow/tensorflow/commit/6fd02f44810754ae7481838b6a67c5dfPatchThird Party Advisory
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-cjc7-49v2-jp64ExploitPatchThird Party Advisory
• https://github.com/tensorflow/tensorflow/commit/41727ff06111117bdf86b37db198217fPatchThird Party Advisory
• https://github.com/tensorflow/tensorflow/commit/6fd02f44810754ae7481838b6a67c5dfPatchThird Party Advisory
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-cjc7-49v2-jp64ExploitPatchThird Party Advisory