CVSS: 7.5EPSS: 0%CPEs: 13EXPL: 1CVE-2021-33560 – libgcrypt: mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm
https://notcve.org/view.php?id=CVE-2021-33560
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. Libgcrypt versiones anteriores a 1.8.8 y versiones 1.9.x anteriores a 1.9.3, maneja inapropiadamente el cifrado de ElGamal porque carece de cegado de exponentes para hacer frente a un ataque de canal lateral contra la función mpi_powm, y el tamaño de la ventana no se elige apropiadamente. Esto, por ejemplo, afecta el uso de ElGamal en OpenPGP. A side-channel attack flaw was found in the way libgcrypt implemented Elgamal encryption. • https://github.com/IBM/PGP-client-checker-CVE-2021-33560 https://dev.gnupg.org/T5305 https://dev.gnupg.org/T5328 https://dev.gnupg.org/T5466 https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61 https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL • CWE-203: Observable Discrepancy CWE-327: Use of a Broken or Risky Cryptographic Algorithm •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 2CVE-2021-3345
https://notcve.org/view.php?id=CVE-2021-3345
_gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a heap-based buffer overflow when the digest final function sets a large count value. It is recommended to upgrade to 1.9.1 or later. La función _gcry_md_block_write en el archivo cipher/hash-common.c en la versión 1.9.0 de Libgcrypt tiene un desbordamiento de búfer basado en la pila cuando la función final del resumen establece un valor de recuento grande. Se recomienda actualizar a la versión 1.9.1 o posterior. • https://github.com/MLGRadish/CVE-2021-3345 https://github.com/SpiralBL0CK/CVE-2021-3345 https://bugs.gentoo.org/show_bug.cgi?id=767814 https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75276949f13b6373b5c04f7065af750b08 https://gnupg.org https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html https://www.oracle.com//security-alerts/cpujul2021.html • CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 1CVE-2020-25125
https://notcve.org/view.php?id=CVE-2020-25125
GnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly unspecified other impact, when a victim imports an attacker's OpenPGP key, and this key has AEAD preferences. The overflow is caused by a g10/key-check.c error. NOTE: GnuPG 2.3.x is unaffected. GnuPG 2.2.23 is a fixed version. GnuPG versiones 2.2.21 y 2.2.22 (y Gpg4win versión 3.1.12), presenta un desbordamiento de la matriz, conllevando a un bloqueo o posiblemente otro impacto no especificado, cuando una víctima importa la clave OpenPGP de un atacante, y esta clave contiene preferencias AEAD. • http://www.openwall.com/lists/oss-security/2020/09/03/4 http://www.openwall.com/lists/oss-security/2020/09/03/5 https://bugzilla.opensuse.org/show_bug.cgi?id=1176034 https://dev.gnupg.org/T5050 https://dev.gnupg.org/rG8ec9573e57866dda5efb4677d4454161517484bc https://lists.gnupg.org/pipermail/gnupg-announce/2020q3/000448.html • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 1CVE-2019-14855
https://notcve.org/view.php?id=CVE-2019-14855
A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18. Se detectó un fallo en la manera en que podrían ser falsificadas las firmas de certificados usando colisiones encontradas en el algoritmo SHA-1. Un atacante podría usar esta debilidad para crear firmas de certificados falsificadas. • https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855 https://dev.gnupg.org/T4755 https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html https://rwc.iacr.org/2020/slides/Leurent.pdf https://usn.ubuntu.com/4516-1 • CWE-326: Inadequate Encryption Strength •
CVSS: 5.3EPSS: 1%CPEs: 3EXPL: 1CVE-2011-2207
https://notcve.org/view.php?id=CVE-2011-2207
dirmngr before 2.1.0 improperly handles certain system calls, which allows remote attackers to cause a denial of service (DOS) via a specially-crafted certificate. dirmngr versiones anteriores a la versión 2.1.0, maneja inapropiadamente determinadas llamadas del sistema, lo que permite a atacantes remotos causar una denegación de servicio (DOS) por medio de un certificado especialmente diseñado. • https://access.redhat.com/security/cve/cve-2011-2207 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627377 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-2207 https://security-tracker.debian.org/tracker/CVE-2011-2207 https://www.openwall.com/lists/oss-security/2011/06/15/6 • CWE-295: Improper Certificate Validation •