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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWo3cm0tOHd3NC14eDJn

Division by zero in TFLite's implementation of `SpaceToDepth`


The Prepare step of the SpaceToDepth TFLite operator does not check for 0 before division.

const int block_size = params->block_size;
const int input_height = input->dims->data[1];
const int input_width = input->dims->data[2];
int output_height = input_height / block_size;
int output_width = input_width / block_size;

An attacker can craft a model such that params->block_size would be zero.


We have patched the issue in GitHub commit 0d45ea1ca641b21b73bcf9c00e0179cda284e7e7.

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.

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This vulnerability has been reported by members of the Aivul Team from Qihoo 360.

Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: about 2 years ago
Updated: 4 months ago

CVSS Score: 2.5
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Identifiers: GHSA-j7rm-8ww4-xx2g, CVE-2021-29587

Affected Packages

Versions: >= 2.4.0, < 2.4.2, >= 2.3.0, < 2.3.3, >= 2.2.0, < 2.2.3, < 2.1.4
Fixed in: 2.4.2, 2.3.3, 2.2.3, 2.1.4