CVE-2021-37646

Advisory

Tensorflow-rocm 2.3.4, 2.4.3, 2.5.1 and 2.6.0 include a fix for CVE-2021-37646: In affected versions the implementation of 'tf.raw_ops.StringNGrams' is vulnerable to an integer overflow issue caused by converting a signed integer value to an unsigned one and then allocating memory based on this value. The implementation (https://github.com/tensorflow/tensorflow/blob/8d72537c6abf5a44103b57b9c2e22c14f5f49698/tensorflow/core/kernels/string_ngrams_op.cc#L184) calls 'reserve' on a 'tstring' with a value that sometimes can be negative if user supplies negative 'ngram_widths'. The 'reserve' method calls 'TF_TString_Reserve' which has an 'unsigned long' argument for the size of the buffer. Hence, the implicit conversion transforms the negative value to a large integer. The Tensorflow team has patched the issue in GitHub commit c283e542a3f422420cfdb332414543b62fc4e4a5.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

This vulnerability has no description

Resources

• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-h6jh-7gv5-28vg
• https://github.com/tensorflow/tensorflow/commit/c283e542a3f422420cfdb332414543b62fc4e4a5
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-37646