CVE-2021-33560

Sažetak

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.

Reference

https://dev.gnupg.org/T5466
https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61
https://dev.gnupg.org/T5305
https://dev.gnupg.org/T5328
https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.oracle.com/security-alerts/cpujan2022.html
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.oracle.com/security-alerts/cpujul2022.html
https://security.gentoo.org/glsa/202210-13
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/

CVSS

Base:	5.0
Impact:	2.9
Exploitability:	10.0

Pristup

Vektor	Složenost	Autentikacija
NETWORK	LOW	NONE

Impact

Povjerljivost	Cjelovitost	Dostupnost
PARTIAL	NONE	NONE

CVSS vektor

AV:N/AC:L/Au:N/C:P/I:N/A:N

Zadnje važnije ažuriranje

07-11-2023 - 03:35

Objavljeno

08-06-2021 - 11:15