Vulnerability Details : CVE-2021-29609

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.
Published 2021-05-14 20:15:16
Updated 2021-05-20 16:45:49
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Products affected by CVE-2021-29609

Exploit prediction scoring system (EPSS) score for CVE-2021-29609

EPSS FAQ
0.09%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 38 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-29609

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.6
 MEDIUM AV:L/AC:L/Au:N/C:P/I:P/A:P
3.9
6.4
 NIST
7.8
 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
 NIST
5.3
 MEDIUM CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
1.0
4.2
 GitHub, Inc.

CWE ids for CVE-2021-29609

  • The product dereferences a pointer that it expects to be valid but is NULL.
    Assigned by: nvd@nist.gov (Primary)
  • The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.
    Assigned by: security-advisories@github.com (Secondary)
  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-29609

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