vulnerability
Arch Linux: Private key recovery (CVE-2021-33560)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:P/I:N/A:N) | Jun 8, 2021 | Jul 11, 2025 | Sep 22, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
Jun 8, 2021
Added
Jul 11, 2025
Modified
Sep 22, 2025
Description
Libgcrypt before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. (There is also an interoperability problem because the selection of the k integer value does not properly consider the differences between basic ElGamal encryption and generalized ElGamal encryption.) This, for example, affects use of ElGamal in OpenPGP.
Solution
arch-linux-upgrade-latest
References
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