Vulnerability Details : CVE-2020-15209
Potential exploit
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-15209
- cpe:2.3:a:google:tensorflow:*:*:*:*:lite:*:*:*
- cpe:2.3:a:google:tensorflow:*:*:*:*:lite:*:*:*
- cpe:2.3:a:google:tensorflow:*:*:*:*:lite:*:*:*
- cpe:2.3:a:google:tensorflow:*:*:*:*:lite:*:*:*
- cpe:2.3:a:google:tensorflow:*:*:*:*:lite:*:*:*
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-15209
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-15209
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
5.9
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.2
|
3.6
|
NIST | |
5.9
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.2
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2020-15209
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: security-advisories@github.com (Primary)
References for CVE-2020-15209
-
https://github.com/tensorflow/tensorflow/commit/0b5662bc2be13a8c8f044d925d87fb6e56247cd8
[tflite] Ensure input tensors don't have `nullptr` buffers. · tensorflow/tensorflow@0b5662b · GitHubPatch;Third Party Advisory
-
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-qh32-6jjc-qprm
Null pointer dereference in TFLite · Advisory · tensorflow/tensorflow · GitHubExploit;Third Party Advisory
-
https://github.com/tensorflow/tensorflow/releases/tag/v2.3.1
Release TensorFlow 2.3.1 · tensorflow/tensorflow · GitHubThird Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00065.html
[security-announce] openSUSE-SU-2020:1766-1: moderate: Security update fMailing List;Third Party Advisory
Jump to