CVE-2020-15213
Denial of service in tensorflow-lite
Description
In TensorFlow Lite before versions 2.2.1 and 2.3.1, models using segment sum can trigger a denial of service by causing an out of memory allocation in the implementation of segment sum. Since code uses the last element of the tensor holding them to determine the dimensionality of output tensor, attackers can use a very large value to trigger a large allocation. The issue is patched in commit 204945b19e44b57906c9344c0d00120eeeae178a and is released in TensorFlow versions 2.2.1, or 2.3.1. A potential workaround would be to add a custom `Verifier` to limit the maximum value in the segment ids tensor. This only handles the case when the segment ids are stored statically in the model, but a similar validation could be done if the segment ids are generated at runtime, between inference steps. However, if the segment ids are generated as outputs of a tensor during inference steps, then there are no possible workaround and users are advised to upgrade to patched code.
How to fix CVE-2020-15213
To remediate CVE-2020-15213, upgrade the affected package to a fixed version below.
- —upgrade to 2.2.1 or later
- —upgrade to 2.2.1 or later
- —upgrade to 204945b19e44b57906c9344c0d00120eeeae178a or later
- —upgrade to 204945b19e44b57906c9344c0d00120eeeae178a or later
- —upgrade to 2.2.1 or later
- —upgrade to 204945b19e44b57906c9344c0d00120eeeae178a or later
- —upgrade to 2.2.1 or later
Is CVE-2020-15213 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (7)
- >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- >= 2.2.0, < 2.2.1
- from 0, < 204945b19e44b57906c9344c0d00120eeeae178a | >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- from 0, < 204945b19e44b57906c9344c0d00120eeeae178a | >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- >= 2.2.0, < 2.2.1
- from 0, < 204945b19e44b57906c9344c0d00120eeeae178a | >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- >= 2.2.0, < 2.2.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L |
| osv | CVSS 3.1 | MEDIUM4.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L |