VULNERABILITY INTELLIGENCE
CVE-2021-33560
CVSS score7.5 HIGH
EPSS probability2.37%
CISA KEVNot currently listed
Published2021-06-08
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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.
Weakness classification
- nvd@nist.gov: CWE-203
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-325
Primary references
- cve@mitre.org — Release Notes, Vendor Advisory
- cve@mitre.org — Vendor Advisory
- cve@mitre.org — Release Notes, Vendor Advisory
- cve@mitre.org — Patch, Vendor Advisory
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org — Third Party Advisory
- cve@mitre.org — Patch, Third Party Advisory
- cve@mitre.org — Patch, Third Party Advisory
- cve@mitre.org — Patch, Third Party Advisory
- cve@mitre.org — Third Party Advisory