CVE-2021-37686
Infinite loop in TensorFlow Lite
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
TensorFlow is an end-to-end open source platform for machine learning. In affected versions the strided slice implementation in TFLite has a logic bug which can allow an attacker to trigger an infinite loop. This arises from newly introduced support for [ellipsis in axis definition](https://github.com/tensorflow/tensorflow/blob/149562d49faa709ea80df1d99fc41d005b81082a/tensorflow/lite/kernels/strided_slice.cc#L103-L122). An attacker can craft a model such that `ellipsis_end_idx` is smaller than `i` (e.g., always negative). In this case, the inner loop does not increase `i` and the `continue` statement causes execution to skip over the preincrement at the end of the outer loop. We have patched the issue in GitHub commit dfa22b348b70bb89d6d6ec0ff53973bacb4f4695. TensorFlow 2.6.0 is the only affected version.
TensorFlow es una plataforma de código abierto de extremo a extremo para el aprendizaje automático. En las versiones afectadas, la implementación strided slice en TFLite presenta un fallo lógico que puede permitir a un atacante desencadenar un bucle infinito. Esto se debe al soporte recientemente introducido para [ellipsis en la definición de ejes](https://github.com/tensorflow/tensorflow/blob/149562d49faa709ea80df1d99fc41d005b81082a/tensorflow/lite/kernels/strided_slice.cc#L103-L122). Un atacante puede diseñar un modelo tal que "ellipsis_end_idx" sea menor que "i" (por ejemplo, siempre negativo). En este caso, el bucle interno no incrementa "i" y la sentencia "continue" hace que la ejecución se salte el preincremento al final del bucle externo. Hemos parcheado el problema en el commit dfa22b348b70bb89d6d6ec0ff53973bacb4f4695 de GitHub. TensorFlow versión 2.6.0 es la única versión afectada.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-07-29 CVE Reserved
- 2021-08-12 CVE Published
- 2023-03-08 EPSS Updated
- 2024-11-13 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
References (2)
| URL | Tag | Source |
|---|---|---|
| https://github.com/tensorflow/tensorflow/security/advisories/GHSA-mhhc-q96p-mfm9 | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/tensorflow/tensorflow/commit/dfa22b348b70bb89d6d6ec0ff53973bacb4f4695 | 2021-08-18 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Google Search vendor "Google" | Tensorflow Search vendor "Google" for product "Tensorflow" | >= 2.3.0 < 2.3.4 Search vendor "Google" for product "Tensorflow" and version " >= 2.3.0 < 2.3.4" | - |
Affected
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| Google Search vendor "Google" | Tensorflow Search vendor "Google" for product "Tensorflow" | >= 2.4.0 < 2.4.3 Search vendor "Google" for product "Tensorflow" and version " >= 2.4.0 < 2.4.3" | - |
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| Google Search vendor "Google" | Tensorflow Search vendor "Google" for product "Tensorflow" | 2.5.0 Search vendor "Google" for product "Tensorflow" and version "2.5.0" | - |
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| Google Search vendor "Google" | Tensorflow Search vendor "Google" for product "Tensorflow" | 2.6.0 Search vendor "Google" for product "Tensorflow" and version "2.6.0" | rc0 |
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| Google Search vendor "Google" | Tensorflow Search vendor "Google" for product "Tensorflow" | 2.6.0 Search vendor "Google" for product "Tensorflow" and version "2.6.0" | rc1 |
Affected
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| Google Search vendor "Google" | Tensorflow Search vendor "Google" for product "Tensorflow" | 2.6.0 Search vendor "Google" for product "Tensorflow" and version "2.6.0" | rc2 |
Affected
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