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CVE-2020-15707

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 …

Impact

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.

Affected products

VendorProductAffected versions
GnuGrub2
through 2.04
RedhatEnterprise Linux Atomic Host
All versions
RedhatOpenshift Container Platform
Version 4.0
RedhatEnterprise Linux
Versions 7.0, 8.0
MicrosoftWindows 10
All versions
Versions 1607, 1709, 1803, 1809, 1903
MicrosoftWindows 8.1
All versions
MicrosoftWindows Rt 8.1
All versions
MicrosoftWindows Server 2012
All versions
Version r2
MicrosoftWindows Server 2016
All versions
Versions 1903, 1909, 2004
MicrosoftWindows Server 2019
All versions
CanonicalUbuntu Linux
Versions 14.04, 16.04, 18.04, 20.04
DebianDebian Linux
Version 10.0

Weakness classification

CWE-362CWE-190

References