Weak ElGamal Key Parameter Vulnerability in PyCrypto

CVE-2018-6594 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

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.

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