CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
17.2%
According to the versions of the util-linux package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :
A flaw was found in the util-linux chfn and chsh utilities when compiled with Readline support. The Readline library uses an ‘INPUTRC’ environment variable to get a path to the library config file. When the library cannot parse the specified file, it prints an error message containing data from the file. This flaw allows an unprivileged user to read root-owned files, potentially leading to privilege escalation.
This flaw affects util-linux versions prior to 2.37.4. (CVE-2022-0563)
A logical error was found in util-linux’s libmount library in a function that allows unprivileged users to unmount FUSE filesystems. Incorrect uid checking allows unprivileged users to unmount FUSE filesystems with similar uid users, an attacker could exploit this vulnerability to cause a denial of (CVE-2021-3995)
that allows unprivileged users to unmount FUSE filesystems. Issues related to parsing the /proc/self/mountinfo file allow unprivileged users to unmount other users’ filesystems that are themselves world-writable (such as /tmp) or mounted in a world-writable directory. An attacker could exploit this (CVE-2021-3996)
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.
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(163219);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/17");
script_cve_id("CVE-2021-3995", "CVE-2021-3996", "CVE-2022-0563");
script_name(english:"EulerOS Virtualization 2.10.1 : util-linux (EulerOS-SA-2022-2069)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the util-linux package installed, the EulerOS Virtualization installation on the remote
host is affected by the following vulnerabilities :
- A flaw was found in the util-linux chfn and chsh utilities when compiled with Readline support. The
Readline library uses an 'INPUTRC' environment variable to get a path to the library config file. When the
library cannot parse the specified file, it prints an error message containing data from the file. This
flaw allows an unprivileged user to read root-owned files, potentially leading to privilege escalation.
This flaw affects util-linux versions prior to 2.37.4. (CVE-2022-0563)
- A logical error was found in util-linux's libmount library in a function that allows unprivileged users to
unmount FUSE filesystems. Incorrect uid checking allows unprivileged users to unmount FUSE filesystems
with similar uid users, an attacker could exploit this vulnerability to cause a denial of (CVE-2021-3995)
- that allows unprivileged users to unmount FUSE filesystems. Issues related to parsing the
/proc/self/mountinfo file allow unprivileged users to unmount other users' filesystems that are themselves
world-writable (such as /tmp) or mounted in a world-writable directory. An attacker could exploit this
(CVE-2021-3996)
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-2022-2069
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cf922d33");
script_set_attribute(attribute:"solution", value:
"Update the affected util-linux packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-0563");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2022/02/21");
script_set_attribute(attribute:"patch_publication_date", value:"2022/07/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/07/15");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:util-linux");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.10.1");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022-2023 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/uvp_version");
exit(0);
}
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 (uvp != "2.10.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.10.1");
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);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);
var flag = 0;
var pkgs = [
"util-linux-2.35.2-2.h24.eulerosv2r10"
];
foreach (var pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_NOTE,
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, "util-linux");
}
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
17.2%