CVE-2018-6594

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.

References

https://usn.ubuntu.com/3616-2/

https://usn.ubuntu.com/3616-1/

https://security.gentoo.org/glsa/202007-62

https://lists.debian.org/debian-lts-announce/2018/02/msg00018.html

https://github.com/dlitz/pycrypto/issues/253

https://github.com/TElgamal/attack-on-pycrypto-elgamal

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3