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5.7 Moyenne

CVE-2020-15707 Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of…

Description

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.

Produits et versions touchés

Produit Versions touchées Corrigé en
grub2 in Ubuntu 2.04 premières → < 2.04-1ubuntu26.1 2.04-1ubuntu26.1
grub2 in Ubuntu 2.02 premières → < 2.02-2ubuntu8.16 2.02-2ubuntu8.16

Références

Chronologie

  1. Publiée
  2. Dernière modification

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CVE-2020-15705 GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed 6.4 Moyenne CVE-2020-15706 GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can… 6.4 Moyenne
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