CVE-2020-15707

NameCVE-2020-15707
DescriptionInteger 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-4735-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
grub2 (PTS)jessie, jessie (lts)2.02~beta2-22+deb8u2vulnerable
stretch (lts), stretch2.02~beta3-5+deb9u3vulnerable
buster (security), buster, buster (lts)2.06-3~deb10u4fixed
bullseye (security), bullseye2.06-3~deb11u6fixed
bookworm (security), bookworm2.06-13+deb12u1fixed
sid, trixie2.12-5fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
grub2sourcebuster2.02+dfsg1-20+deb10u1DSA-4735-1
grub2source(unstable)2.04-9

Notes

[stretch] - grub2 <ignored> (No SecureBoot support in stretch)
https://www.openwall.com/lists/oss-security/2020/07/29/3
https://git.savannah.gnu.org/gitweb/?p=grub.git;a=commit;h=e7b8856f8be3292afdb38d2e8c70ad8d62a61e10
[jessie] - grub2 <ignored> (No SecureBoot support in jessie)

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