6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8 Medium
AI Score
Confidence
Low
0.0005 Low
EPSS
Percentile
18.1%
The remote host is missing an update for the Huawei EulerOS
# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.1.2.2022.2611");
script_cve_id("CVE-2021-3695", "CVE-2021-3696", "CVE-2022-28734");
script_tag(name:"creation_date", value:"2022-10-28 04:30:21 +0000 (Fri, 28 Oct 2022)");
script_version("2024-02-05T14:36:57+0000");
script_tag(name:"last_modification", value:"2024-02-05 14:36:57 +0000 (Mon, 05 Feb 2024)");
script_tag(name:"cvss_base", value:"6.9");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:C/I:C/A:C");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2024-01-16 19:43:16 +0000 (Tue, 16 Jan 2024)");
script_name("Huawei EulerOS: Security Advisory for grub2 (EulerOS-SA-2022-2611)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2022 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\.0SP3");
script_xref(name:"Advisory-ID", value:"EulerOS-SA-2022-2611");
script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2022-2611");
script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'grub2' package(s) announced via the EulerOS-SA-2022-2611 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 grub 2, where a crafted 16-bit grayscale PNG image may lead to an out-of-bounds write. This flaw allows an attacker to corrupt the data on the heap portion of the grub2's memory, leading to possible code execution and the circumvention of the secure boot mechanism.(CVE-2021-3695)
A flaw was found in grub2 when handling a PNG image header. When decoding the data contained in the Huffman table at the PNG file header, an out-of-bounds write may happen on grub's heap.(CVE-2021-3696)
A flaw was found in grub2 when handling split HTTP headers. While processing a split HTTP header, grub2 wrongly advances its control pointer to the internal buffer by one position, which can lead to an out-of-bounds write. This flaw allows an attacker to leverage this issue by crafting a malicious set of HTTP packages making grub2 corrupt its internal memory metadata structure. This leads to data integrity and confidentiality issues or forces grub to crash, resulting in a denial of service attack.(CVE-2022-28734)");
script_tag(name:"affected", value:"'grub2' package(s) on Huawei EulerOS V2.0SP3.");
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-2.0SP3") {
if(!isnull(res = isrpmvuln(pkg:"grub2", rpm:"grub2~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-common", rpm:"grub2-common~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-efi-x64", rpm:"grub2-efi-x64~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-efi-x64-cdboot", rpm:"grub2-efi-x64-cdboot~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-efi-x64-modules", rpm:"grub2-efi-x64-modules~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-pc", rpm:"grub2-pc~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-pc-modules", rpm:"grub2-pc-modules~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-tools", rpm:"grub2-tools~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-tools-extra", rpm:"grub2-tools-extra~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"grub2-tools-minimal", rpm:"grub2-tools-minimal~2.02~0.64.h15", rls:"EULEROS-2.0SP3"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8 Medium
AI Score
Confidence
Low
0.0005 Low
EPSS
Percentile
18.1%