CVE-2018-6594
Public on 2018-02-03
Modified on 2025-03-05
Description
lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for PyCrypto's ElGamal implementation.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | python-crypto | 2018-03-21 | ALAS-2018-977 | Fixed |
| Amazon Linux 2 - Ansible2 Extra | python-crypto | 2025-03-03 | ALAS2ANSIBLE2-2025-012 | Fixed |
| Amazon Linux 2023 | python-crypto | Pending Fix | ||
| Amazon Linux 2 - Core | python-cryptography | Not Affected | ||
| Amazon Linux 2023 | python-cryptography | Not Affected | ||
| Amazon Linux 2023 | python-pycryptodomex | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | CVSSv2 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| NVD | CVSSv3 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |