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.

How to fix CVE-2020-15707

To remediate CVE-2020-15707, upgrade the affected package to a fixed version below.

• —upgrade to 2.06-r0 or later
• —upgrade to 2.04-9 or later

Is CVE-2020-15707 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 2.06-r0
• from 0, < 2.04-9

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2020-15707
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2020-15707