Ubuntu 22.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5471-1)

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5471-1. 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(161958);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2022-1012",
    "CVE-2022-1205",
    "CVE-2022-1734",
    "CVE-2022-21499",
    "CVE-2022-29968"
  );
  script_xref(name:"USN", value:"5471-1");

  script_name(english:"Ubuntu 22.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5471-1)");

  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 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-5471-1 advisory.

    It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when
    booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot
    restrictions. (CVE-2022-21499)

    Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the
    removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local
    attacker could use this to cause a denial of service (system crash) or execute arbitrary code.
    (CVE-2022-1966)

    Moshe Kol, Amit Klein and Yossi Gilad discovered that the IP implementation in the Linux kernel did not
    provide sufficient randomization when calculating port offsets. An attacker could possibly use this to
    expose sensitive information. (CVE-2022-1012)

    Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol implementation in the Linux
    kernel, leading to use-after-free vulnerabilities. A local attacker could possibly use this to cause a
    denial of service (system crash). (CVE-2022-1205)

    It was discovered that the Marvell NFC device driver implementation in the Linux kernel did not properly
    perform memory cleanup operations in some situations, leading to a use-after-free vulnerability. A local
    attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code.
    (CVE-2022-1734)

    Minh Yuan discovered that the floppy driver in the Linux kernel contained a race condition in some
    situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial
    of service (system crash) or possibly execute arbitrary code. (CVE-2022-1836)

    Ziming Zhang discovered that the netfilter subsystem in the Linux kernel did not properly validate sets
    with multiple ranged fields. A local attacker could use this to cause a denial of service or execute
    arbitrary code. (CVE-2022-1972)

    Joseph Ravichandran and Michael Wang discovered that the io_uring subsystem in the Linux kernel did not
    properly initialize data in some situations. A local attacker could use this to expose sensitive
    information (kernel memory). (CVE-2022-29968)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues 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-5471-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-29968");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-1012");

  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:"2022/05/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/06/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.17.0-1011-oem");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  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) 2022-2024 Canonical, Inc. / NASL script (C) 2022-2024 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('debian_package.inc');
include('ksplice.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 (! ('22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04', '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 kernel_mappings = {
  '22.04': {
    '5.17.0': {
      'oem': '5.17.0-1011'
    }
  }
};

var host_kernel_release = get_kb_item('Host/uptrack-uname-r');
if (empty_or_null(host_kernel_release)) host_kernel_release = get_kb_item_or_exit('Host/uname-r');
var host_kernel_base_version = get_kb_item_or_exit('Host/Debian/kernel-base-version');
var host_kernel_type = get_kb_item_or_exit('Host/Debian/kernel-type');
if(empty_or_null(kernel_mappings[os_release][host_kernel_base_version][host_kernel_type])) audit(AUDIT_INST_VER_NOT_VULN, 'kernel ' + host_kernel_release);

var extra = '';
var kernel_fixed_version = kernel_mappings[os_release][host_kernel_base_version][host_kernel_type] + "-" + host_kernel_type;
if (deb_ver_cmp(ver1:host_kernel_release, ver2:kernel_fixed_version) < 0)
{
  extra += 'Running Kernel level of ' + host_kernel_release + ' does not meet the minimum fixed level of ' + kernel_fixed_version + ' for this advisory.\n\n';
}
  else
{
  audit(AUDIT_PATCH_INSTALLED, 'Kernel package for USN-5471-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2022-1012', 'CVE-2022-1205', 'CVE-2022-1734', 'CVE-2022-21499', 'CVE-2022-29968');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-5471-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}