High severity7.5NVD Advisory· Published Feb 7, 2018· Updated Jun 17, 2026
CVE-2018-6829
CVE-2018-6829
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.
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Affected products
2- Range: <=1.8.2
Patches
Vulnerability mechanics
References
2- lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.htmlnvdIssue TrackingThird Party Advisory
- www.oracle.com/security-alerts/cpujan2020.htmlnvd
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