grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass

A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention...

grub2: Heap based out-of-bounds write when redering certain unicode sequences

A flaw was found in the grub2 font code. When rendering certain unicode sequences, it fails to properly validate the font width and height. These values are further used to access the font buffer, causing possible out-of-bounds writes. A malicious actor may craft a font capable of triggering this...

DEBIAN-CVE-2022-3775

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption an...

AZL-34792 CVE-2022-3775 affecting package grub2 for versions less than 2.06-14

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption an...

DEBIAN-CVE-2022-2601

A buffer overflow was found in grubfontconstructglyph. A malicious crafted pf2 font can lead to an overflow when calculating the maxglyphsize 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...

AZL-11604 CVE-2022-2601 affecting package grub2 for versions less than 2.06-8

A buffer overflow was found in grubfontconstructglyph. A malicious crafted pf2 font can lead to an overflow when calculating the maxglyphsize 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...

CVE-2022-2601

A buffer overflow was found in grubfontconstructglyph. A malicious crafted pf2 font can lead to an overflow when calculating the maxglyphsize 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...

AZL-34787 CVE-2022-2601 affecting package grub2 for versions less than 2.06-14

A buffer overflow was found in grubfontconstructglyph. A malicious crafted pf2 font can lead to an overflow when calculating the maxglyphsize 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...

UBUNTU-CVE-2022-2601

A buffer overflow was found in grubfontconstructglyph. A malicious crafted pf2 font can lead to an overflow when calculating the maxglyphsize 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...

CVE-2022-2601

A buffer overflow was found in grubfontconstructglyph. A malicious crafted pf2 font can lead to an overflow when calculating the maxglyphsize 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...

CVE-2022-2601

The CVE-2022-2601 issue is a vulnerability in grub2’s font rendering path: a crafted pf2 font causes an overflow in grub_font_construct_glyph(), which can allocate too small a buffer for a glyph and trigger a heap-based out-of-bounds write. This vulnerability can be exploited to bypass Secure Boo...

grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass

A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention...

Fedora: Security Advisory for grub2 (FEDORA-2022-7ce9378e90)

The remote host is missing an update for the Copyright C 2022 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

[SECURITY] Fedora 35 Update: grub2-2.06-14.fc35

The GRand Unified Bootloader GRUB is a highly configurable and customizable bootloader with modular architecture. It supports a rich variety of kernel formats, file systems, computer architectures and hardware devices...

CLSA-2022-1669390018 grub2: Fix of 7 CVEs

CVE-2021-3981: Fix default privileges of grub.cfg file - CVE-2022-28736: Fix use-after-free bug when grubcmdchainloader is executed more than once before a boot attempt is performed. - CVE-2021-3695: Drop greyscale support to fix heap out-of-bounds write - CVE-2021-3696: Fix out of range...

The vulnerability of the Grub configuration file, related to writing beyond the buffer boundaries, allows an attacker to access confidential data, compromise its integrity, and cause service failures.

The vulnerability of the Grub configuration file is related to writing beyond the buffer’s boundaries. Exploiting this vulnerability allows an attacker to access confidential data, compromise its integrity, and even cause a service failure using a specially created JPEG image...

The vulnerability of the Grub configuration file allows a perpetrator to gain access to confidential data, compromise its integrity, and cause service failures.

The vulnerability of the Grub configuration file is related to writing beyond the buffer boundaries. Exploiting this vulnerability allows an attacker to access confidential data, compromise its integrity, and cause service failures...

[SECURITY] Fedora 37 Update: grub2-2.06-63.fc37

The GRand Unified Bootloader GRUB is a highly configurable and customizable bootloader with modular architecture. It supports a rich variety of kernel formats, file systems, computer architectures and hardware devices...

The vulnerability of the grub_font_construct_glyph() function, a loader for the Grub2 operating system, allows a hacker to execute arbitrary code.

The vulnerability of the grubfontconstructglyph function, a part of the Grub2 operating system loader, is related to the issue where an operation goes beyond the buffer boundaries in memory when processing specially formatted glyphs in the pf2 format. Exploiting this vulnerability allows an...

The vulnerability of Grub2 operating system loaders, related to the execution of operations outside the buffer boundaries, allows attackers to execute arbitrary code.

The vulnerability of Grub2 operating system loaders is related to the issue where operations occur outside of the buffer in memory when rendering certain Unicode sequences using a specially crafted font. Exploiting this vulnerability allows an attacker to execute arbitrary code...