CVSS: 6.4EPSS: 0%CPEs: 33EXPL: 1CVE-2020-15707 – GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.
https://notcve.org/view.php?id=CVE-2020-15707
28 Jul 2020 — 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 ... • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html • CWE-190: Integer Overflow or Wraparound CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 8.2EPSS: 0%CPEs: 5EXPL: 1CVE-2020-10713 – grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process
https://notcve.org/view.php?id=CVE-2020-10713
28 Jul 2020 — A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string t... • https://github.com/eclypsium/BootHole • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: 9.8EPSS: 2%CPEs: 6EXPL: 1CVE-2015-8370 – grub2: buffer overflow when checking password entered during bootup
https://notcve.org/view.php?id=CVE-2015-8370
15 Dec 2015 — Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an "Off-by-two" or "Out of bounds overwrite" memory error. Múltiple desbordamiento inferior de entero en Grub2 1.98 hasta la versión 2.02 permite a atacantes ... • http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html • CWE-191: Integer Underflow (Wrap or Wraparound) CWE-264: Permissions, Privileges, and Access Controls CWE-787: Out-of-bounds Write •