Vulnerability Details : CVE-2021-29605

TensorFlow is an end-to-end open source platform for machine learning. The TFLite code for allocating `TFLiteIntArray`s is vulnerable to an integer overflow issue(https://github.com/tensorflow/tensorflow/blob/4ceffae632721e52bf3501b736e4fe9d1221cdfa/tensorflow/lite/c/common.c#L24-L27). An attacker can craft a model such that the `size` multiplier is so large that the return value overflows the `int` datatype and becomes negative. In turn, this results in invalid value being given to `malloc`(https://github.com/tensorflow/tensorflow/blob/4ceffae632721e52bf3501b736e4fe9d1221cdfa/tensorflow/lite/c/common.c#L47-L52). In this case, `ret->size` would dereference an invalid pointer. 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.

Vulnerability category: Overflow

Published 2021-05-14 20:15:16

Updated 2021-05-18 15:12:56

Source GitHub, Inc.

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-29605

Probability of exploitation activity in the next 30 days: 0.04%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 11 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-29605

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:N/A:P	3.9	2.9	nvd@nist.gov
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	nvd@nist.gov
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High
7.1	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H	1.8	5.2	security-advisories@github.com
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: High

CWE ids for CVE-2021-29605

CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.

Assigned by: security-advisories@github.com (Primary)

References for CVE-2021-29605

https://github.com/tensorflow/tensorflow/security/advisories/GHSA-jf7h-7m85-w2v2

Integer overflow in TFLite memory allocation · Advisory · tensorflow/tensorflow · GitHub
Exploit;Patch;Third Party Advisory
https://github.com/tensorflow/tensorflow/commit/7c8cc4ec69cd348e44ad6a2699057ca88faad3e5

Fix a dangerous integer overflow and a malloc of negative size. · tensorflow/tensorflow@7c8cc4e · GitHub
Patch;Third Party Advisory

Products affected by CVE-2021-29605

Google » Tensorflow
Versions from including (>=) 2.3.0 and before (<) 2.3.3
cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*
Matching versions
Google » Tensorflow
Versions before (<) 2.1.4
cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*
Matching versions
Google » Tensorflow
Versions from including (>=) 2.2.0 and before (<) 2.2.3
cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*
Matching versions
Google » Tensorflow
Versions from including (>=) 2.4.0 and before (<) 2.4.2
cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*
Matching versions