CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 1CVE-2023-4692 – Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
https://notcve.org/view.php?id=CVE-2023-4692
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. Se encontró una falla de escritura fuera de los límites en el controlador del sistema de archivos NTFS de grub2. • https://access.redhat.com/errata/RHSA-2024:2456 https://access.redhat.com/errata/RHSA-2024:3184 https://access.redhat.com/security/cve/CVE-2023-4692 https://bugzilla.redhat.com/show_bug.cgi?id=2236613 https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.or • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 5.3EPSS: 0%CPEs: 3EXPL: 1CVE-2023-4693 – Grub2: out-of-bounds read at fs/ntfs.c
https://notcve.org/view.php?id=CVE-2023-4693
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. Se encontró una falla de lectura fuera de los límites en el controlador del sistema de archivos NTFS de grub2. Este problema puede permitir que un atacante físicamente presente presente una imagen del sistema de archivos NTFS especialmente manipulada para leer ubicaciones de memoria arbitrarias. • https://access.redhat.com/errata/RHSA-2024:2456 https://access.redhat.com/errata/RHSA-2024:3184 https://access.redhat.com/security/cve/CVE-2023-4693 https://bugzilla.redhat.com/show_bug.cgi?id=2238343 https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.or • CWE-125: Out-of-bounds Read •
CVSS: 7.1EPSS: 0%CPEs: 2EXPL: 0CVE-2022-3775 – grub2: Heap based out-of-bounds write when redering certain unicode sequences
https://notcve.org/view.php?id=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 and availability issues. Although complex, arbitrary code execution could not be discarded. Al representar ciertas secuencias Unicode, el código de fuente de grub2 no se valida correctamente si el ancho y alto del glifo informado están restringidos dentro del tamaño del mapa de bits. Como consecuencia, un atacante puede crear una entrada que provocará una escritura fuera de los límites en el montón de grub2, lo que provocará daños en la memoria y problemas de disponibilidad. • https://access.redhat.com/security/cve/cve-2022-3775 https://security.gentoo.org/glsa/202311-14 https://access.redhat.com/security/cve/CVE-2022-3775 https://bugzilla.redhat.com/show_bug.cgi?id=2138880 • CWE-787: Out-of-bounds Write •
CVSS: 8.6EPSS: 0%CPEs: 12EXPL: 0CVE-2022-2601 – grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass
https://notcve.org/view.php?id=CVE-2022-2601
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. Se encontró un desbordamiento del búfer en grub_font_construct_glyph(). Una fuente pf2 manipulada maliciosamente puede provocar un desbordamiento al calcular el valor max_glyph_size, asignando un búfer más pequeño de lo necesario para el glifo, lo que además provoca un desbordamiento del búfer y una escritura fuera de los límites basada en el heap. • https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0 https://security.gentoo.org/glsa/202311-14 https://security.netapp.com/advisory/ntap-20230203-0004 https://access.redhat.com/security/cve/CVE-2022-2601 https://bugzilla.redhat.com/show_bug.cgi?id=2112975 • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 41EXPL: 0CVE-2021-3695 – grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap
https://notcve.org/view.php?id=CVE-2021-3695
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12. Una imagen PNG en escala de grises de 16 bits diseñada puede conllevar a una escritura fuera de límites en el área de la pila. • https://bugzilla.redhat.com/show_bug.cgi?id=1991685 https://security.gentoo.org/glsa/202209-12 https://security.netapp.com/advisory/ntap-20220930-0001 https://access.redhat.com/security/cve/CVE-2021-3695 • CWE-787: Out-of-bounds Write •