CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
31.4%
According to the versions of the grub2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
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(158315);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");
script_cve_id("CVE-2020-15705");
script_xref(name:"IAVA", value:"2020-A-0349");
script_xref(name:"CEA-ID", value:"CEA-2020-0061");
script_name(english:"EulerOS 2.0 SP8 : grub2 (EulerOS-SA-2022-1194)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing a security update.");
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 :
- GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be
bypassed. This only affects systems where the kernel signing certificate has been imported directly into
the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects
GRUB2 version 2.04 and prior versions. (CVE-2020-15705)
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-2022-1194
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?098597a0");
script_set_attribute(attribute:"solution", value:
"Update the affected grub2 packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/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-2020-15705");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/29");
script_set_attribute(attribute:"patch_publication_date", value:"2022/02/23");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/23");
script_set_attribute(attribute:"plugin_type", value:"local");
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-aa64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-aa64-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:grub2-efi-aa64-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:"stig_severity", value:"II");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "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);
var release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");
var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "EulerOS UVP " + uvp);
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var 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);
var flag = 0;
var pkgs = [
"grub2-common-2.02-62.h34.eulerosv2r8",
"grub2-efi-aa64-2.02-62.h34.eulerosv2r8",
"grub2-efi-aa64-cdboot-2.02-62.h34.eulerosv2r8",
"grub2-efi-aa64-modules-2.02-62.h34.eulerosv2r8",
"grub2-tools-2.02-62.h34.eulerosv2r8",
"grub2-tools-extra-2.02-62.h34.eulerosv2r8",
"grub2-tools-minimal-2.02-62.h34.eulerosv2r8"
];
foreach (var pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"8", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
var 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-common | p-cpe:/a:huawei:euleros:grub2-common |
huawei | euleros | grub2-efi-aa64 | p-cpe:/a:huawei:euleros:grub2-efi-aa64 |
huawei | euleros | grub2-efi-aa64-cdboot | p-cpe:/a:huawei:euleros:grub2-efi-aa64-cdboot |
huawei | euleros | grub2-efi-aa64-modules | p-cpe:/a:huawei:euleros:grub2-efi-aa64-modules |
huawei | euleros | grub2-tools | p-cpe:/a:huawei:euleros:grub2-tools |
huawei | euleros | grub2-tools-extra | p-cpe:/a:huawei:euleros:grub2-tools-extra |
huawei | euleros | grub2-tools-minimal | p-cpe:/a:huawei:euleros:grub2-tools-minimal |
huawei | euleros | 2.0 | cpe:/o:huawei:euleros:2.0 |
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
31.4%