Filtered by vendor Gnu
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Filtered by product Grub2
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Total
33 CVE
| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2024-1048 | 3 Fedoraproject, Gnu, Redhat | 3 Fedora, Grub2, Enterprise Linux | 2024-11-06 | 3.3 Low |
| A flaw was found in the grub2-set-bootflag utility of grub2. After the fix of CVE-2019-14865, grub2-set-bootflag will create a temporary file with the new grubenv content and rename it to the original grubenv file. If the program is killed before the rename operation, the temporary file will not be removed and may fill the filesystem when invoked multiple times, resulting in a filesystem out of free inodes or blocks. | ||||
| CVE-2022-28733 | 2 Gnu, Redhat | 5 Grub2, Enterprise Linux, Rhel E4s and 2 more | 2024-10-24 | 8.1 High |
| 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. | ||||
| CVE-2022-28735 | 2 Gnu, Redhat | 4 Grub2, Enterprise Linux, Rhel E4s and 1 more | 2024-10-24 | 6.7 Medium |
| 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. | ||||
| CVE-2022-28736 | 2 Gnu, Redhat | 4 Grub2, Enterprise Linux, Rhel E4s and 1 more | 2024-10-24 | 6.4 Medium |
| 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. | ||||
| CVE-2015-8370 | 3 Fedoraproject, Gnu, Redhat | 3 Fedora, Grub2, Enterprise Linux | 2024-10-21 | 7.4 High |
| 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. | ||||
| CVE-2020-15707 | 8 Canonical, Debian, Gnu and 5 more | 19 Ubuntu Linux, Debian Linux, Grub2 and 16 more | 2024-09-17 | 5.7 Medium |
| 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. | ||||
| CVE-2020-15705 | 7 Canonical, Debian, Gnu and 4 more | 18 Ubuntu Linux, Debian Linux, Grub2 and 15 more | 2024-09-17 | 6.4 Medium |
| GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions. | ||||
| CVE-2020-15706 | 7 Canonical, Debian, Gnu and 4 more | 18 Ubuntu Linux, Debian Linux, Grub2 and 15 more | 2024-09-16 | 6.4 Medium |
| GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions. | ||||
| CVE-2021-46705 | 3 Gnu, Opensuse, Suse | 3 Grub2, Factory, Linux Enterprise Server | 2024-09-16 | 5.1 Medium |
| 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. | ||||
| CVE-2023-4001 | 3 Fedoraproject, Gnu, Redhat | 4 Fedora, Grub2, Enterprise Linux and 1 more | 2024-09-16 | 6.8 Medium |
| An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a file system with a duplicate UUID (the same as in the "/boot/" file system) can bypass the GRUB password protection feature on UEFI systems, which enumerate removable drives before non-removable ones. This issue was introduced in a downstream patch in Red Hat's version of grub2 and does not affect the upstream package. | ||||
| CVE-2023-4693 | 2 Gnu, Redhat | 2 Grub2, Enterprise Linux | 2024-09-16 | 5.3 Medium |
| An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk. | ||||
| CVE-2023-4692 | 2 Gnu, Redhat | 2 Grub2, Enterprise Linux | 2024-09-16 | 7.5 High |
| An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved. | ||||
| CVE-2022-2601 | 3 Fedoraproject, Gnu, Redhat | 13 Fedora, Grub2, Enterprise Linux and 10 more | 2024-08-22 | 8.6 High |
| A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism. | ||||
| CVE-2019-14865 | 2 Gnu, Redhat | 3 Grub2, Enterprise Linux, Enterprise Linux Eus | 2024-08-05 | 5.5 Medium |
| A flaw was found in the grub2-set-bootflag utility of grub2. A local attacker could run this utility under resource pressure (for example by setting RLIMIT), causing grub2 configuration files to be truncated and leaving the system unbootable on subsequent reboots. | ||||
| CVE-2020-27779 | 4 Fedoraproject, Gnu, Netapp and 1 more | 12 Fedora, Grub2, Ontap Select Deploy Administration Utility and 9 more | 2024-08-04 | 7.5 High |
| 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. | ||||
| CVE-2020-27749 | 4 Fedoraproject, Gnu, Netapp and 1 more | 12 Fedora, Grub2, Ontap Select Deploy Administration Utility and 9 more | 2024-08-04 | 6.7 Medium |
| 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 threat from this vulnerability is to data confidentiality and integrity as well as system availability. | ||||
| CVE-2020-25647 | 4 Fedoraproject, Gnu, Netapp and 1 more | 12 Fedora, Grub2, Ontap Select Deploy Administration Utility and 9 more | 2024-08-04 | 7.6 High |
| 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. | ||||
| CVE-2020-25632 | 4 Fedoraproject, Gnu, Netapp and 1 more | 12 Fedora, Grub2, Ontap Select Deploy Administration Utility and 9 more | 2024-08-04 | 8.2 High |
| A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. | ||||
| CVE-2020-14372 | 4 Fedoraproject, Gnu, Netapp and 1 more | 13 Fedora, Grub2, Cloud Backup and 10 more | 2024-08-04 | 7.5 High |
| 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 vulnerability is to data confidentiality and integrity, as well as system availability. | ||||
| CVE-2020-14309 | 3 Gnu, Opensuse, Redhat | 7 Grub2, Leap, Enterprise Linux and 4 more | 2024-08-04 | 6.7 Medium |
| There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data. | ||||