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Ubuntu: (Multiple Advisories) (CVE-2021-40528): Libgcrypt vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-40528): Libgcrypt vulnerabilities

Severity
3
CVSS
(AV:N/AC:H/Au:N/C:P/I:N/A:N)
Published
09/06/2021
Created
09/21/2021
Added
09/17/2021
Modified
03/22/2023

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)

  • ubuntu-upgrade-libgcrypt20

References

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