CVE-2021-33560
HIGH7.5EPSS 0.43%Published: 6/8/2021Modified: 4/28/2026
Description
Libgcrypt before 1.8.8 and 1.9.x 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. This, for example, affects use of ElGamal in OpenPGP.
Affected packages (2)
- Alpine/libgcryptfrom 0, < 1.8.8-r0
- Debian/libgcrypt20from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |