CVE-2021-33560

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.

Patch Available

Fix available through Seal Security.  
No upgrade required, protect your application instantly.

Fix without upgrading

Score

Severity

Ecosystem

APT

Publish Date

June 8, 2021

Modified Date

December 5, 2025

Score Vector

Affected Versions