CVE-2020-15209
Null pointer dereference in tensorflow-lite
Description
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, a crafted TFLite model can force a node to have as input a tensor backed by a `nullptr` buffer. This can be achieved by changing a buffer index in the flatbuffer serialization to convert a read-only tensor to a read-write one. The runtime assumes that these buffers are written to before a possible read, hence they are initialized with `nullptr`. However, by changing the buffer index for a tensor and implicitly converting that tensor to be a read-write one, as there is nothing in the model that writes to it, we get a null pointer dereference. The issue is patched in commit 0b5662bc, and is released in TensorFlow versions 1.15.4, 2.0.3, 2.1.2, 2.2.1, or 2.3.1.
How to fix CVE-2020-15209
To remediate CVE-2020-15209, upgrade the affected package to a fixed version below.
- —upgrade to 1.15.4 or later
- —upgrade to 1.15.4 or later
- —upgrade to 0b5662bc2be13a8c8f044d925d87fb6e56247cd8 or later
- —upgrade to 0b5662bc2be13a8c8f044d925d87fb6e56247cd8 or later
- —upgrade to 1.15.4 or later
- —upgrade to 0b5662bc2be13a8c8f044d925d87fb6e56247cd8 or later
- —upgrade to 1.15.4 or later
Is CVE-2020-15209 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (7)
- from 0, < 1.15.4, >= 2.0.0, < 2.0.3, >= 2.1.0, < 2.1.2, >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- from 0, < 1.15.4
- from 0, < 0b5662bc2be13a8c8f044d925d87fb6e56247cd8 | from 0, < 1.15.4, >= 2.0.0, < 2.0.3, >= 2.1.0, < 2.1.2, >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- from 0, < 0b5662bc2be13a8c8f044d925d87fb6e56247cd8 | from 0, < 1.15.4, >= 2.0.0, < 2.0.3, >= 2.1.0, < 2.1.2, >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- from 0, < 1.15.4
- from 0, < 0b5662bc2be13a8c8f044d925d87fb6e56247cd8 | from 0, < 1.15.4, >= 2.0.0, < 2.0.3, >= 2.1.0, < 2.1.2, >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.1
- from 0, < 1.15.4
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:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |