Use of a Broken or Risky Cryptographic Algorithm Affecting libgcrypt package, versions <0:1.8.5-7.el8_6



    Attack Complexity High
    Confidentiality High
Expand this section
5.9 medium
Expand this section
Red Hat
5.9 medium

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  • published 14 Oct 2021
  • disclosed 20 Jul 2021

How to fix?

Upgrade Centos:8 libgcrypt to version 0:1.8.5-7.el8_6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt package and not the libgcrypt package as distributed by Centos:8. See How to fix? for Centos:8 relevant fixed versions and status.

The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.