6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
8.3 High
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
15.7%
The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.10 / 24.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6851-1 advisory.
Andreas Hasenack discovered that netplan incorrectly handled the permissions for netdev files containing wireguard configuration. An attacker could use this to obtain wireguard secret keys.
It was discovered that netplan configuration could be manipulated into injecting arbitrary commands while setting up network interfaces. An attacker could use this to execute arbitrary commands or escalate privileges.
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6851-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('compat.inc');
if (description)
{
script_id(201048);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/26");
script_cve_id("CVE-2022-4968");
script_xref(name:"USN", value:"6851-1");
script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 23.10 / 24.04 LTS : Netplan vulnerabilities (USN-6851-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.10 / 24.04 LTS host has packages installed that are affected by a
vulnerability as referenced in the USN-6851-1 advisory.
Andreas Hasenack discovered that netplan incorrectly handled the permissions for netdev files containing
wireguard configuration. An attacker could use this to obtain wireguard secret keys.
It was discovered that netplan configuration could be manipulated into injecting arbitrary commands while
setting up network interfaces. An attacker could use this to execute arbitrary commands or escalate
privileges.
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-6851-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/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:L/UI:N/S:C/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-4968");
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:"2024/06/07");
script_set_attribute(attribute:"patch_publication_date", value:"2024/06/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/06/26");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.10");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnetplan-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnetplan0");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnetplan1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:netplan-generator");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:netplan.io");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-netplan");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2024 Canonical, Inc. / NASL script (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
exit(0);
}
include('debian_package.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release || '23.10' >< os_release || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 23.10 / 24.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var pkgs = [
{'osver': '20.04', 'pkgname': 'libnetplan-dev', 'pkgver': '0.104-0ubuntu2~20.04.5'},
{'osver': '20.04', 'pkgname': 'libnetplan0', 'pkgver': '0.104-0ubuntu2~20.04.5'},
{'osver': '20.04', 'pkgname': 'netplan.io', 'pkgver': '0.104-0ubuntu2~20.04.5'},
{'osver': '22.04', 'pkgname': 'libnetplan-dev', 'pkgver': '0.106.1-7ubuntu0.22.04.3'},
{'osver': '22.04', 'pkgname': 'libnetplan0', 'pkgver': '0.106.1-7ubuntu0.22.04.3'},
{'osver': '22.04', 'pkgname': 'netplan.io', 'pkgver': '0.106.1-7ubuntu0.22.04.3'},
{'osver': '23.10', 'pkgname': 'libnetplan-dev', 'pkgver': '0.107-5ubuntu0.3'},
{'osver': '23.10', 'pkgname': 'libnetplan0', 'pkgver': '0.107-5ubuntu0.3'},
{'osver': '23.10', 'pkgname': 'netplan-generator', 'pkgver': '0.107-5ubuntu0.3'},
{'osver': '23.10', 'pkgname': 'netplan.io', 'pkgver': '0.107-5ubuntu0.3'},
{'osver': '23.10', 'pkgname': 'python3-netplan', 'pkgver': '0.107-5ubuntu0.3'},
{'osver': '24.04', 'pkgname': 'libnetplan-dev', 'pkgver': '1.0-2ubuntu1.1'},
{'osver': '24.04', 'pkgname': 'libnetplan1', 'pkgver': '1.0-2ubuntu1.1'},
{'osver': '24.04', 'pkgname': 'netplan-generator', 'pkgver': '1.0-2ubuntu1.1'},
{'osver': '24.04', 'pkgname': 'netplan.io', 'pkgver': '1.0-2ubuntu1.1'},
{'osver': '24.04', 'pkgname': 'python3-netplan', 'pkgver': '1.0-2ubuntu1.1'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var osver = NULL;
var pkgname = NULL;
var pkgver = NULL;
if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
if (osver && pkgname && pkgver) {
if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : ubuntu_report_get()
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libnetplan-dev / libnetplan0 / libnetplan1 / netplan-generator / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 23.10 | cpe:/o:canonical:ubuntu_linux:23.10 |
canonical | ubuntu_linux | netplan.io | p-cpe:/a:canonical:ubuntu_linux:netplan.io |
canonical | ubuntu_linux | 20.04 | cpe:/o:canonical:ubuntu_linux:20.04:-:lts |
canonical | ubuntu_linux | 24.04 | cpe:/o:canonical:ubuntu_linux:24.04:-:lts |
canonical | ubuntu_linux | python3-netplan | p-cpe:/a:canonical:ubuntu_linux:python3-netplan |
canonical | ubuntu_linux | libnetplan0 | p-cpe:/a:canonical:ubuntu_linux:libnetplan0 |
canonical | ubuntu_linux | 22.04 | cpe:/o:canonical:ubuntu_linux:22.04:-:lts |
canonical | ubuntu_linux | netplan-generator | p-cpe:/a:canonical:ubuntu_linux:netplan-generator |
canonical | ubuntu_linux | libnetplan-dev | p-cpe:/a:canonical:ubuntu_linux:libnetplan-dev |
canonical | ubuntu_linux | libnetplan1 | p-cpe:/a:canonical:ubuntu_linux:libnetplan1 |
6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
8.3 High
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
15.7%