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Total 44 CVE
CVE Vendors Products Updated CVSS v3.1
CVE-2020-14310 4 Canonical, Gnu, Opensuse and 1 more 11 Ubuntu Linux, Grub2, Leap and 8 more 2024-11-21 5.7 Medium
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.
CVE-2020-14309 3 Gnu, Opensuse, Redhat 7 Grub2, Leap, Enterprise Linux and 4 more 2024-11-21 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.
CVE-2020-14308 3 Gnu, Opensuse, Redhat 7 Grub2, Leap, Enterprise Linux and 4 more 2024-11-21 6.4 Medium
In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This leads the function to return invalid memory allocations which can be further used to cause possible integrity, confidentiality and availability impacts during the boot process.
CVE-2020-10713 5 Debian, Gnu, Opensuse and 2 more 10 Debian Linux, Grub2, Leap and 7 more 2024-11-21 8.2 High
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 to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.