CLSA-2023-1698945053 libgcrypt: Fix of 4 CVEs

CVE-2013-4576: Normalize the MPIs to prevent possible side-channel attacks - CVE-2014-3591: Use ciphertext blinding for Elgamal to prevent possible side-channel attacks - CVE-2021-33560: Use of smaller K for ephemeral key in ElGamal prevent generation of weak keys - CVE-2021-40528: Add exponent...

AZL-41815 CVE-2014-3591 affecting package grub2 for versions less than 2.06-25

Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext blinding for Elgamal decryption, which allows physically proximate attackers to obtain the server's private key by determining factors using crafted ciphertext and the fluctuations in the electromagnetic field during...