CVE-2020-15200
Segfault in Tensorflow
Description
In Tensorflow before version 2.3.1, the `RaggedCountSparseOutput` implementation does not validate that the input arguments form a valid ragged tensor. In particular, there is no validation that the values in the `splits` tensor generate a valid partitioning of the `values` tensor. Thus, the code sets up conditions to cause a heap buffer overflow. A `BatchedMap` is equivalent to a vector where each element is a hashmap. However, if the first element of `splits_values` is not 0, `batch_idx` will never be 1, hence there will be no hashmap at index 0 in `per_batch_counts`. Trying to access that in the user code results in a segmentation fault. The issue is patched in commit 3cbb917b4714766030b28eba9fb41bb97ce9ee02 and is released in TensorFlow version 2.3.1.
How to fix CVE-2020-15200
To remediate CVE-2020-15200, upgrade the affected package to a fixed version below.
- —upgrade to 2.3.1 or later
- —upgrade to 2.3.1 or later
- —upgrade to 3cbb917b4714766030b28eba9fb41bb97ce9ee02 or later
- —upgrade to 3cbb917b4714766030b28eba9fb41bb97ce9ee02 or later
- —upgrade to 2.3.1 or later
- —upgrade to 3cbb917b4714766030b28eba9fb41bb97ce9ee02 or later
- —upgrade to 2.3.1 or later
Is CVE-2020-15200 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (7)
- >= 2.3.0, < 2.3.1
- >= 2.3.0, < 2.3.1
- from 0, < 3cbb917b4714766030b28eba9fb41bb97ce9ee02 | from 0, < 2.3.1
- from 0, < 3cbb917b4714766030b28eba9fb41bb97ce9ee02 | from 0, < 2.3.1
- >= 2.3.0, < 2.3.1
- from 0, < 3cbb917b4714766030b28eba9fb41bb97ce9ee02 | from 0, < 2.3.1
- >= 2.3.0, < 2.3.1
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: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 |