PyCryptodome before 3.6.6 has an integer overflow in the data_len variable in AESNI.c, related to the AESNI_encrypt and AESNI_decrypt functions, leading to the mishandling of messages shorter than 16 bytes
Published Aug 20, 2018
8.7
HIGHCVSS 4.0
EPSS 1.76%
Description
PyCryptodome before 3.6.6 has an integer overflow in the data_len variable in AESNI.c, related to the AESNI_encrypt and AESNI_decrypt functions, leading to the mishandling of messages shorter than 16 bytes.
Affected products
No data.
- < 3.6.6
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.76% (0.01756) | 77.11th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.74% (0.01740) | 74.71th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.13% (0.00126) | 47.75th | v3 (v2023.03.01) |
| Jan 10, 2024 | 0.13% (0.00127) | 47.26th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.14% (0.00139) | 47.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.62% (0.00624) | 17.80th | v1 |
| Jan 6, 2022 | 0.62% (0.00624) | 17.24th | v1 |
| Sep 1, 2021 | 0.62% (0.00624) | 45.04th | v1 |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (5)
- https://github.com/Legrandin/pycryptodome/issues/198 x_refsource_MISCExploitThird Party Advisory
- https://github.com/advisories/GHSA-hgg3-g7gr-66r7 Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/pycryptodome/PYSEC-2018-21.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2018-15560
- https://whitehatck01.blogspot.com/2018/08/integer-overflow-vulnerability-in.html x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/Legrandin/pycryptodome/issues/198 | x_refsource_MISCExploitThird Party Advisory | |
| https://github.com/advisories/GHSA-hgg3-g7gr-66r7 | Advisory | |
| https://github.com/pypa/advisory-database/tree/main/vulns/pycryptodome/PYSEC-2018-21.yaml | ||
| https://nvd.nist.gov/vuln/detail/CVE-2018-15560 | ||
| https://whitehatck01.blogspot.com/2018/08/integer-overflow-vulnerability-in.html | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.