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Red Hat: CVE-2021-40528: ElGamal implementation allows plaintext recovery (Multiple Advisories)

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Red Hat: CVE-2021-40528: ElGamal implementation allows plaintext recovery (Multiple Advisories)

Severity
3
CVSS
(AV:N/AC:H/Au:N/C:P/I:N/A:N)
Published
09/06/2021
Created
07/16/2022
Added
07/05/2022
Modified
12/15/2023

Description

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.

Solution(s)

  • redhat-upgrade-libgcrypt
  • redhat-upgrade-libgcrypt-debuginfo
  • redhat-upgrade-libgcrypt-debugsource
  • redhat-upgrade-libgcrypt-devel
  • redhat-upgrade-libgcrypt-devel-debuginfo

References

  • CVE-2021-40528
  • RHSA-2022:5311

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