8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.6 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.002 Low
EPSS
Percentile
58.2%
The remote host is missing an update for the Huawei EulerOS
# SPDX-FileCopyrightText: 2021 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.1.2.2021.2376");
script_cve_id("CVE-2020-14372", "CVE-2020-25632", "CVE-2020-25647", "CVE-2020-27779", "CVE-2021-20225", "CVE-2021-20233");
script_tag(name:"creation_date", value:"2021-09-15 02:24:22 +0000 (Wed, 15 Sep 2021)");
script_version("2024-02-05T14:36:56+0000");
script_tag(name:"last_modification", value:"2024-02-05 14:36:56 +0000 (Mon, 05 Feb 2024)");
script_tag(name:"cvss_base", value:"7.2");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-03-10 20:28:25 +0000 (Wed, 10 Mar 2021)");
script_name("Huawei EulerOS: Security Advisory for grub2 (EulerOS-SA-2021-2376)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("Huawei EulerOS Local Security Checks");
script_dependencies("gb_huawei_euleros_consolidation.nasl");
script_mandatory_keys("ssh/login/euleros", "ssh/login/rpms", re:"ssh/login/release=EULEROS\-2\.0SP2");
script_xref(name:"Advisory-ID", value:"EulerOS-SA-2021-2376");
script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2021-2376");
script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'grub2' package(s) announced via the EulerOS-SA-2021-2376 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"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)
A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.(CVE-2020-14372)
A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2020-27779)");
script_tag(name:"affected", value:"'grub2' package(s) on Huawei EulerOS V2.0SP2.");
script_tag(name:"solution", value:"Please install the updated package(s).");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"package");
exit(0);
}
include("revisions-lib.inc");
include("pkg-lib-rpm.inc");
release = rpm_get_ssh_release();
if(!release)
exit(0);
res = "";
report = "";
if(release == "EULEROS-2.0SP2") {
if(!isnull(res = isrpmvuln(pkg:"grub2", rpm:"grub2~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-common", rpm:"grub2-common~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-efi-x64", rpm:"grub2-efi-x64~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-pc", rpm:"grub2-pc~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-pc-modules", rpm:"grub2-pc-modules~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-tools", rpm:"grub2-tools~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-tools-extra", rpm:"grub2-tools-extra~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-tools-minimal", rpm:"grub2-tools-minimal~2.02~0.64.h11", rls:"EULEROS-2.0SP2"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.6 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.002 Low
EPSS
Percentile
58.2%