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CVE-2018-6829

Published: Feb 7, 2018

Modified: Aug 5, 2024

PUBLISHED

Description

cipher/elgamal.c in Libgcrypt through 1.8.2, when used to encrypt messages directly, improperly encodes plaintexts, 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 Libgcrypt's ElGamal implementation.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wiki

x_refsource_MISC

https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.html

x_refsource_MISC

https://github.com/weikengchen/attack-on-libgcrypt-elgamal

x_refsource_MISC

https://www.oracle.com/security-alerts/cpujan2020.html

x_refsource_MISC

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