CVSS: 6.4EPSS: 0%CPEs: 36EXPL: 0CVE-2020-15706 – GRUB2 contains a race condition leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing.
https://notcve.org/view.php?id=CVE-2020-15706
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. GRUB2 contiene una condición de carrera en la función grub_script_function_create() que conlleva a una vulnerabilidad de uso de la memoria previamente liberada la cual puede ser desencadenada al redefinir una función mientras la misma función ya se está ejecutando, conllevando a una ejecución de código arbitrario y a una omisión de restricción de arranque seguro. Este problema afecta a GRUB2 versiones 2.04 y versiones anteriores • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html http://ubuntu.com/security/notices/USN-4432-1 http://www.openwall.com/lists/oss-security/2020/07/29/3 https://access.redhat.com/security/vulnerabilities/grub2bootloader https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 https://security.gentoo.org/ • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-416: Use After Free •
CVSS: 6.4EPSS: 0%CPEs: 33EXPL: 1CVE-2020-15707 – GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.
https://notcve.org/view.php?id=CVE-2020-15707
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. Se detectaron desbordamientos de enteros en las funciones grub_cmd_initrd y grub_initrd_init en el componente efilinux de GRUB2, como se incluye en Debian, Red Hat y Ubuntu (la funcionalidad no está incluida aguas arriba de GRUB2), conllevando a un desbordamiento del búfer en la región heap de la memoria. • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html http://ubuntu.com/security/notices/USN-4432-1 http://www.openwall.com/lists/oss-security/2020/07/29/3 https://access.redhat.com/security/vulnerabilities/grub2bootloader https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 https://security.gentoo.org/ • CWE-190: Integer Overflow or Wraparound CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 7.8EPSS: 0%CPEs: 12EXPL: 0CVE-2020-1463
https://notcve.org/view.php?id=CVE-2020-1463
An elevation of privilege vulnerability exists in the way that the SharedStream Library handles objects in memory, aka 'Windows SharedStream Library Elevation of Privilege Vulnerability'. Se presenta una vulnerabilidad de elevación de privilegios en la manera en que la SharedStream Library maneja objetos en memoria, también se conoce como "Windows SharedStream Library Elevation of Privilege Vulnerability" • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1463 •
CVSS: 6.5EPSS: 11%CPEs: 20EXPL: 0CVE-2020-1468
https://notcve.org/view.php?id=CVE-2020-1468
An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory, aka 'Windows GDI Information Disclosure Vulnerability'. Se presenta una vulnerabilidad de divulgación de información cuando el componente Windows GDI divulga inapropiadamente el contenido de su memoria, también se conoce como "Windows GDI Information Disclosure Vulnerability" • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1468 •
CVSS: 7.1EPSS: 0%CPEs: 25EXPL: 0CVE-2020-1461
https://notcve.org/view.php?id=CVE-2020-1461
An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arbitrary locations.To exploit the vulnerability, an attacker would first have to log on to the system, aka 'Microsoft Defender Elevation of Privilege Vulnerability'. Se presenta una vulnerabilidad de elevación de privilegios cuando el archivo MpSigStub.exe para Defender permite una eliminación de archivos en ubicaciones arbitrarias. Para explotar la vulnerabilidad, un atacante primero debe iniciar sesión en el sistema, también se conoce como "Microsoft Defender Elevation of Privilege Vulnerability" • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1461 •