According to the versions of the grub2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
A flaw was found in grub2 in versions prior to 2.06.
During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2020-25647)
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.(CVE-2021-20225)
A flaw was found in grub2 in versions prior to 2.06.
The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2020-25632)
A flaw was found in grub2 in versions prior to 2.06.
Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2021-20233)
Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(149593);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/01");
script_cve_id(
"CVE-2020-25632",
"CVE-2020-25647",
"CVE-2021-20225",
"CVE-2021-20233"
);
script_name(english:"EulerOS 2.0 SP5 : grub2 (EulerOS-SA-2021-1900)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the grub2 packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :
- A flaw was found in grub2 in versions prior to 2.06.
During USB device initialization, descriptors are read
with very little bounds checking and assumes the USB
device is providing sane values. If properly exploited,
an attacker could trigger memory corruption leading to
arbitrary code execution allowing a bypass of the
Secure Boot mechanism. The highest threat from this
vulnerability is to data confidentiality and integrity
as well as system availability.(CVE-2020-25647)
- 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.(CVE-2021-20225)
- A flaw was found in grub2 in versions prior to 2.06.
The rmmod implementation allows the unloading of a
module used as a dependency without checking if any
other dependent module is still loaded leading to a
use-after-free scenario. This could allow arbitrary
code to be executed or a bypass of Secure Boot
protections. The highest threat from this vulnerability
is to data confidentiality and integrity as well as
system availability.(CVE-2020-25632)
- A flaw was found in grub2 in versions prior to 2.06.
Setparam_prefix() in the menu rendering code performs a
length calculation on the assumption that expressing a
quoted single quote will require 3 characters, while it
actually requires 4 characters which allows an attacker
to corrupt memory by one byte for each quote in the
input. The highest threat from this vulnerability is to
data confidentiality and integrity as well as system
availability.(CVE-2021-20233)
Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
# https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-1900
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?620b1a78");
script_set_attribute(attribute:"solution", value:
"Update the affected grub2 packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20233");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"patch_publication_date", value:"2021/05/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/05/18");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-ia32");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-ia32-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-x64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-x64-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-x64-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-pc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-pc-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-tools-extra");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-tools-minimal");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
script_exclude_keys("Host/EulerOS/uvp_version");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "EulerOS UVP " + uvp);
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
flag = 0;
pkgs = ["grub2-2.02-0.65.2.h20.eulerosv2r7",
"grub2-common-2.02-0.65.2.h20.eulerosv2r7",
"grub2-efi-ia32-2.02-0.65.2.h20.eulerosv2r7",
"grub2-efi-ia32-cdboot-2.02-0.65.2.h20.eulerosv2r7",
"grub2-efi-x64-2.02-0.65.2.h20.eulerosv2r7",
"grub2-efi-x64-cdboot-2.02-0.65.2.h20.eulerosv2r7",
"grub2-efi-x64-modules-2.02-0.65.2.h20.eulerosv2r7",
"grub2-pc-2.02-0.65.2.h20.eulerosv2r7",
"grub2-pc-modules-2.02-0.65.2.h20.eulerosv2r7",
"grub2-tools-2.02-0.65.2.h20.eulerosv2r7",
"grub2-tools-extra-2.02-0.65.2.h20.eulerosv2r7",
"grub2-tools-minimal-2.02-0.65.2.h20.eulerosv2r7"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"5", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "grub2");
}
Vendor | Product | Version | CPE |
---|---|---|---|
huawei | euleros | grub2 | p-cpe:/a:huawei:euleros:grub2 |
huawei | euleros | grub2-common | p-cpe:/a:huawei:euleros:grub2-common |
huawei | euleros | grub2-efi-ia32 | p-cpe:/a:huawei:euleros:grub2-efi-ia32 |
huawei | euleros | grub2-efi-ia32-cdboot | p-cpe:/a:huawei:euleros:grub2-efi-ia32-cdboot |
huawei | euleros | grub2-efi-x64 | p-cpe:/a:huawei:euleros:grub2-efi-x64 |
huawei | euleros | grub2-efi-x64-cdboot | p-cpe:/a:huawei:euleros:grub2-efi-x64-cdboot |
huawei | euleros | grub2-efi-x64-modules | p-cpe:/a:huawei:euleros:grub2-efi-x64-modules |
huawei | euleros | grub2-pc | p-cpe:/a:huawei:euleros:grub2-pc |
huawei | euleros | grub2-pc-modules | p-cpe:/a:huawei:euleros:grub2-pc-modules |
huawei | euleros | grub2-tools | p-cpe:/a:huawei:euleros:grub2-tools |