CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2022-28735 – grub2: shim_lock verifier allows non-kernel files to be loaded
https://notcve.org/view.php?id=CVE-2022-28735
20 Jun 2022 — The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain. A flaw was found in grub2. The shim_lock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed. Red Hat Advanced Cluster Management for Kubernetes... • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28735 • CWE-829: Inclusion of Functionality from Untrusted Control Sphere •
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
20 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: 8.1EPSS: 0%CPEs: 1EXPL: 0CVE-2022-28733 – Integer underflow in grub_net_recv_ip4_packets
https://notcve.org/view.php?id=CVE-2022-28733
20 Jun 2022 — Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer. A flaw was found in grub2 when handling IPv4 packets. This flaw allows an attacker to craft a mali... • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28733 • CWE-191: Integer Underflow (Wrap or Wraparound) •
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: 0%CPEs: 20EXPL: 0CVE-2020-27779 – grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled
https://notcve.org/view.php?id=CVE-2020-27779
03 Mar 2021 — A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. 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 comando cutmem no respeta el bloqueo de s... • https://bugzilla.redhat.com/show_bug.cgi?id=1900698 • CWE-285: Improper Authorization •
CVSS: 7.6EPSS: 0%CPEs: 20EXPL: 0CVE-2020-25647 – grub2: Out-of-bounds write in grub_usb_device_initialize()
https://notcve.org/view.php?id=CVE-2020-25647
03 Mar 2021 — A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. 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 anterior... • https://bugzilla.redhat.com/show_bug.cgi?id=1886936 • CWE-787: Out-of-bounds Write •
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 •