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
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. This flaw allows an attacker to gain access to restricted data or cause arbitrary code execution if they can establish control from grub's memory allocation pattern. • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736 https://security.netapp.com/advisory/ntap-20230825-0002 https://www.openwall.com/lists/oss-security/2022/06/07/5 https://access.redhat.com/security/cve/CVE-2022-28736 https://bugzilla.redhat.com/show_bug.cgi?id=2092613 • CWE-416: Use After Free •
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
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 arbitrarios. Este problema afecta a: SUSE Linux Enterprise Server 15 SP4 grub2 versiones anteriores a 2.06-150400.7.1. • 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
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 configuración, conocido como grub.cfg, es creado con un conjunto de permisos erróneo que permite a usuarios no privilegiado leer su contenido. • http://www.openwall.com/lists/oss-security/2024/01/15/3 https://bugzilla.redhat.com/show_bug.cgi?id=2024170 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX https://security.gentoo.org/glsa/202209-12 https://access.redhat.com/security/cve/CVE-2021-3981 • CWE-276: Incorrect Default Permissions •
CVSS: 6.4EPSS: 0%CPEs: 1EXPL: 0CVE-2021-3418
https://notcve.org/view.php?id=CVE-2021-3418
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 directamente. • https://bugzilla.redhat.com/show_bug.cgi?id=1933757 • CWE-281: Improper Preservation of Permissions •
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
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 al llamar a determinados comandos con una gran cantidad de formularios de opciones cortos específicos. • https://bugzilla.redhat.com/show_bug.cgi?id=1924696 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R https://security.gentoo.org/glsa/202104-05 https://security.netapp.com/advisory/ntap-20220325-0001 https://access.redhat.com/security/cve/CVE-2021-20225 • CWE-787: Out-of-bounds Write •