CVE-2020-15707

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

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
grub2 (PTS)	jessie, jessie (lts)	2.02~beta2-22+deb8u2	vulnerable
	stretch (lts), stretch	2.02~beta3-5+deb9u3	vulnerable
	buster (security), buster, buster (lts)	2.06-3~deb10u4	fixed
	bullseye (security), bullseye	2.06-3~deb11u6	fixed
	bookworm (security), bookworm	2.06-13+deb12u1	fixed
	sid, trixie	2.12-5	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
grub2	source	buster	2.02+dfsg1-20+deb10u1		DSA-4735-1
grub2	source	(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)