The remote Ubuntu 21.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4950-1 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 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4950-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(149406);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/17");
script_cve_id("CVE-2021-3489", "CVE-2021-3490", "CVE-2021-3491");
script_xref(name:"USN", value:"4950-1");
script_name(english:"Ubuntu 21.04 : Linux kernel vulnerabilities (USN-4950-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Ubuntu 21.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the
USN-4950-1 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-4950-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:H/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:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3491");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploit_framework_core", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'Linux eBPF ALU32 32-bit Invalid Bounds Tracking LPE');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/05/11");
script_set_attribute(attribute:"patch_publication_date", value:"2021/05/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/05/12");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:21.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1005-azure");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1006-oracle");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1007-aws");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1007-gcp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1007-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1008-raspi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1008-raspi-nolpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-17-generic");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-17-generic-64k");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-17-generic-lpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-17-lowlatency");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-aws");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-azure");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04-edge");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-20.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-20.04-edge");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-20.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-20.04-edge");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-gke");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-20.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-20.04-edge");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi-nolpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-20.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-20.04-edge");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2021-2023 Canonical, Inc. / NASL script (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
exit(0);
}
include('audit.inc');
include('ubuntu.inc');
include('ksplice.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item('Host/Ubuntu/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
release = chomp(release);
if (! preg(pattern:"^(21\.04)$", string:release)) audit(AUDIT_OS_NOT, 'Ubuntu 21.04', 'Ubuntu ' + release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
rm_kb_item(name:'Host/uptrack-uname-r');
cve_list = make_list('CVE-2021-3489', 'CVE-2021-3490', 'CVE-2021-3491');
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-4950-1');
}
else
{
_ubuntu_report = ksplice_reporting_text();
}
}
pkgs = [
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-1005-azure', 'pkgver': '5.11.0-1005.5'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-1006-oracle', 'pkgver': '5.11.0-1006.6'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-1007-aws', 'pkgver': '5.11.0-1007.7'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-1007-gcp', 'pkgver': '5.11.0-1007.7'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-1007-kvm', 'pkgver': '5.11.0-1007.7'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-1008-raspi', 'pkgver': '5.11.0-1008.8'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-1008-raspi-nolpae', 'pkgver': '5.11.0-1008.8'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-17-generic', 'pkgver': '5.11.0-17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-17-generic-64k', 'pkgver': '5.11.0-17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-17-generic-lpae', 'pkgver': '5.11.0-17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-5.11.0-17-lowlatency', 'pkgver': '5.11.0-17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-aws', 'pkgver': '5.11.0.1007.7'},
{'osver': '21.04', 'pkgname': 'linux-image-azure', 'pkgver': '5.11.0.1005.5'},
{'osver': '21.04', 'pkgname': 'linux-image-gcp', 'pkgver': '5.11.0.1007.7'},
{'osver': '21.04', 'pkgname': 'linux-image-generic', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-64k', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-64k-hwe-20.04', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-64k-hwe-20.04-edge', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-hwe-20.04', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-hwe-20.04-edge', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-lpae', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-lpae-hwe-20.04', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-generic-lpae-hwe-20.04-edge', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-gke', 'pkgver': '5.11.0.1007.7'},
{'osver': '21.04', 'pkgname': 'linux-image-kvm', 'pkgver': '5.11.0.1007.7'},
{'osver': '21.04', 'pkgname': 'linux-image-lowlatency', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-lowlatency-hwe-20.04', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-lowlatency-hwe-20.04-edge', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-oem-20.04', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-oracle', 'pkgver': '5.11.0.1006.6'},
{'osver': '21.04', 'pkgname': 'linux-image-raspi', 'pkgver': '5.11.0.1008.6'},
{'osver': '21.04', 'pkgname': 'linux-image-raspi-nolpae', 'pkgver': '5.11.0.1008.6'},
{'osver': '21.04', 'pkgname': 'linux-image-virtual', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-virtual-hwe-20.04', 'pkgver': '5.11.0.17.18'},
{'osver': '21.04', 'pkgname': 'linux-image-virtual-hwe-20.04-edge', 'pkgver': '5.11.0.17.18'}
];
flag = 0;
foreach package_array ( pkgs ) {
osver = NULL;
pkgname = NULL;
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
{
tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'linux-image-5.11.0-1005-azure / linux-image-5.11.0-1006-oracle / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 21.04 | cpe:/o:canonical:ubuntu_linux:21.04 |
canonical | ubuntu_linux | linux-image-5.11.0-1005-azure | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1005-azure |
canonical | ubuntu_linux | linux-image-5.11.0-1006-oracle | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1006-oracle |
canonical | ubuntu_linux | linux-image-5.11.0-1007-aws | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1007-aws |
canonical | ubuntu_linux | linux-image-5.11.0-1007-gcp | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1007-gcp |
canonical | ubuntu_linux | linux-image-5.11.0-1007-kvm | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1007-kvm |
canonical | ubuntu_linux | linux-image-5.11.0-1008-raspi | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1008-raspi |
canonical | ubuntu_linux | linux-image-5.11.0-1008-raspi-nolpae | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1008-raspi-nolpae |
canonical | ubuntu_linux | linux-image-5.11.0-17-generic | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-17-generic |
canonical | ubuntu_linux | linux-image-5.11.0-17-generic-64k | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-17-generic-64k |