CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2022-28736 – There's a use-after-free vulnerability in grub_cmd_chainloader() function
https://notcve.org/view.php?id=CVE-2022-28736
10 Jun 2022 — There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved. A use-after-free vulnerability was found on grub2's chainloader command. T... • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736 • CWE-416: Use After Free •
CVSS: 6.9EPSS: 0%CPEs: 40EXPL: 0CVE-2021-3696 – grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling
https://notcve.org/view.php?id=CVE-2021-3696
10 Jun 2022 — A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12. Puede producirse una escritura fuera de límites de la p... • https://bugzilla.redhat.com/show_bug.cgi?id=1991686 • CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 39EXPL: 0CVE-2021-3697 – grub2: Crafted JPEG image can lead to buffer underflow write in the heap
https://notcve.org/view.php?id=CVE-2021-3697
10 Jun 2022 — A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12. Una imagen JPEG diseñada puede conllevar que el lector de JPEG desborde su p... • https://bugzilla.redhat.com/show_bug.cgi?id=1991687 • CWE-787: Out-of-bounds Write •
CVSS: 5.1EPSS: 0%CPEs: 4EXPL: 1CVE-2021-46705 – grub2-once uses fixed file name in /var/tmp
https://notcve.org/view.php?id=CVE-2021-46705
16 Mar 2022 — A Insecure Temporary File vulnerability in grub-once of grub2 in SUSE Linux Enterprise Server 15 SP4, openSUSE Factory allows local attackers to truncate arbitrary files. This issue affects: SUSE Linux Enterprise Server 15 SP4 grub2 versions prior to 2.06-150400.7.1. SUSE openSUSE Factory grub2 versions prior to 2.06-18.1. Una vulnerabilidad de Archivos Temporales no Seguros en grub-once de grub2 en SUSE Linux Enterprise Server 15 SP4, openSUSE Factory permite a atacantes locales truncar archivos arbitrario... • https://bugzilla.suse.com/show_bug.cgi?id=1190474 • CWE-377: Insecure Temporary File •
CVSS: 3.3EPSS: 0%CPEs: 2EXPL: 0CVE-2021-3981 – grub2: Incorrect permission in grub.cfg allow unprivileged user to read the file content
https://notcve.org/view.php?id=CVE-2021-3981
08 Mar 2022 — A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong permission set allowing non privileged users to read its content. This represents a low severity confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg. This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no version with the fix is currently released. Se ha encontrado un fallo en grub2 en el que su archivo de ... • http://www.openwall.com/lists/oss-security/2024/01/15/3 • CWE-276: Incorrect Default Permissions •
CVSS: 6.4EPSS: 0%CPEs: 1EXPL: 0CVE-2021-3418
https://notcve.org/view.php?id=CVE-2021-3418
15 Mar 2021 — If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction of CVE-2020-15705 and only affects grub2 versions prior to 2.06 and upstream and distributions using the shim_lock mechanism. Si los certificados que firmaron grub están instalados en db, grub puede ser arrancado d... • https://bugzilla.redhat.com/show_bug.cgi?id=1933757 • CWE-281: Improper Preservation of Permissions •
CVSS: 7.5EPSS: 2%CPEs: 21EXPL: 1CVE-2020-14372 – grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled
https://notcve.org/view.php?id=CVE-2020-14372
03 Mar 2021 — A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vul... • https://github.com/kukrimate/CVE-2020-14372 • CWE-184: Incomplete List of Disallowed Inputs •
CVSS: 7.5EPSS: 0%CPEs: 20EXPL: 0CVE-2020-27749 – grub2: Stack buffer overflow in grub_parser_split_cmdline()
https://notcve.org/view.php?id=CVE-2020-27749
03 Mar 2021 — A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest th... • https://bugzilla.redhat.com/show_bug.cgi?id=1899966 • CWE-121: Stack-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 20EXPL: 0CVE-2021-20225 – grub2: Heap out-of-bounds write in short form option parser
https://notcve.org/view.php?id=CVE-2021-20225
03 Mar 2021 — A flaw was found in grub2 in versions prior to 2.06. The option parser allows an attacker to write past the end of a heap-allocated buffer by calling certain commands with a large number of specific short forms of options. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Se encontró un fallo en grub2 en versiones anteriores a 2.06. El analizador de opciones permite a un atacante escribir más allá del final de un búfer asignado a la pila... • https://bugzilla.redhat.com/show_bug.cgi?id=1924696 • CWE-787: Out-of-bounds Write •
CVSS: 8.2EPSS: 0%CPEs: 20EXPL: 1CVE-2021-20233 – grub2: Heap out-of-bounds write due to miscalculation of space required for quoting
https://notcve.org/view.php?id=CVE-2021-20233
03 Mar 2021 — A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Se encontró un fallo en grub2 en versiones anteriores a 2.06.... • https://github.com/pauljrowland/BootHoleFix • CWE-787: Out-of-bounds Write •