title: Segfault and Out-of-bounds Write write due to incomplete validation in TensorFlow
description: TensorFlow is an open source platform for machine learning. Prior to versions 2.9.0, 2.8.1, 2.7.2, and 2.6.4, the implementation of `tf.raw_ops.EditDistance` has incomplete validation. Users can pass negative values to cause a segmentation fault based denial of service. In multiple places throughout the code, one may compute an index for a write operation. However, the existing validation only checks against the upper bound of the array. Hence, it is possible to write before the array by massaging the input to generate negative values for `loc`. Versions 2.9.0, 2.8.1, 2.7.2, and 2.6.4 contain a patch for this issue.
problem types: CWE-787: Out-of-bounds Write
affected:
{
product: tensorflow
vendor: tensorflow
versions:
status: affected, version: < 2.6.4
status: affected, version: >= 2.7.0rc0, < 2.7.2
status: affected, version: >= 2.8.0rc0, < 2.8.1
status: affected, version: >= 2.9.0rc0, < 2.9.0
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 7.1
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
version: 3.1
]