PyCryptodome integer overflow vulnerability
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pycryptodome | < 3.6.6 | 3.6.6 |
References
- https://whitehatck01.blogspot.com/2018/08/integer-overflow-vulnerability-in.html
- https://github.com/Legrandin/pycryptodome/issues/198
- https://github.com/advisories/GHSA-hgg3-g7gr-66r7
- https://nvd.nist.gov/vuln/detail/CVE-2018-15560
- https://github.com/Legrandin/pycryptodome
- https://github.com/pypa/advisory-database/tree/main/vulns/pycryptodome/PYSEC-2018-21.yaml
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-190- Platform
- Python (PyPI)
- Package
pycryptodome- Disclosed
- 20.08.2018
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2018-21 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-hgg3-g7gr-66r7 - CC BY 4.0
Vulnerability history: pycryptodome
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 08.2018 01.2024
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
Disclosures per year
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 0
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PyCryptodome integer overflow vulnerability this entry
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