CVE-2021-33560
7.5
HIGH
CVSS 3.1
EPSS 2.3%
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.
How to fix CVE-2021-33560
To remediate CVE-2021-33560, upgrade the affected package to a fixed version below.
- Alpine/libgcrypt—upgrade to 1.8.8-r0 or later
Is CVE-2021-33560 being exploited?
Low — EPSS is 2.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 1.9.0, < 1.8.8-r0
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 |