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FreeBSD: VID-7695B0AF-958F-11EC-9AA3-4CCC6ADDA413 (CVE-2021-40530): cryptopp -- ElGamal implementation allows plaintext recovery

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FreeBSD: VID-7695B0AF-958F-11EC-9AA3-4CCC6ADDA413 (CVE-2021-40530): cryptopp -- ElGamal implementation allows plaintext recovery

Severity
3
CVSS
(AV:N/AC:H/Au:N/C:P/I:N/A:N)
Published
09/06/2021
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

Description

The ElGamal implementation in Crypto++ through 8.5 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)

  • freebsd-upgrade-package-cryptopp

References

  • CVE-2021-40530

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