CVE-2020-15707mediumCWE-362

CVE-2020-15707: fallo de gravedad media en Ubuntu grub2 in Ubuntu

GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear grub2 in Ubuntu+ Monitorear grub2

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 5.7epss 1.6%
Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
Productos afectados
Ubuntu · grub2 in Ubuntu
CVEs relacionadas — Ubuntu grub2 in Ubuntu

En el mismo producto, de las más peligrosas a las menos.

CVE-2020-15705MEDIUMGRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimEPSS 1.4%CVE-2020-15706MEDIUMGRUB2 contains a race condition leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing.EPSS 1.0%