Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-5876-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5876-1. 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(171573);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2022-3543",
    "CVE-2022-3619",
    "CVE-2022-3623",
    "CVE-2022-3628",
    "CVE-2022-3640",
    "CVE-2022-41849",
    "CVE-2022-41850",
    "CVE-2022-42895",
    "CVE-2022-47940",
    "CVE-2023-0590"
  );
  script_xref(name:"USN", value:"5876-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-5876-1)");

  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 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-5876-1 advisory.

  - A vulnerability, which was classified as problematic, has been found in Linux Kernel. This issue affects
    the function unix_sock_destructor/unix_release_sock of the file net/unix/af_unix.c of the component BPF.
    The manipulation leads to memory leak. It is recommended to apply a patch to fix this issue. The
    associated identifier of this vulnerability is VDB-211043. (CVE-2022-3543)

  - A vulnerability has been found in Linux Kernel and classified as problematic. This vulnerability affects
    the function l2cap_recv_acldata of the file net/bluetooth/l2cap_core.c of the component Bluetooth. The
    manipulation leads to memory leak. It is recommended to apply a patch to fix this issue. VDB-211918 is the
    identifier assigned to this vulnerability. (CVE-2022-3619)

  - A vulnerability was found in Linux Kernel. It has been declared as problematic. Affected by this
    vulnerability is the function follow_page_pte of the file mm/gup.c of the component BPF. The manipulation
    leads to race condition. The attack can be launched remotely. It is recommended to apply a patch to fix
    this issue. The identifier VDB-211921 was assigned to this vulnerability. (CVE-2022-3623)

  - A buffer overflow flaw was found in the Linux kernel Broadcom Full MAC Wi-Fi driver. This issue occurs
    when a user connects to a malicious USB device. This can allow a local user to crash the system or
    escalate their privileges. (CVE-2022-3628)

  - A vulnerability, which was classified as critical, was found in Linux Kernel. Affected is the function
    l2cap_conn_del of the file net/bluetooth/l2cap_core.c of the component Bluetooth. The manipulation leads
    to use after free. It is recommended to apply a patch to fix this issue. The identifier of this
    vulnerability is VDB-211944. (CVE-2022-3640)

  - drivers/video/fbdev/smscufx.c in the Linux kernel through 5.19.12 has a race condition and resultant use-
    after-free if a physically proximate attacker removes a USB device while calling open(), aka a race
    condition between ufx_ops_open and ufx_usb_disconnect. (CVE-2022-41849)

  - roccat_report_event in drivers/hid/hid-roccat.c in the Linux kernel through 5.19.12 has a race condition
    and resultant use-after-free in certain situations where a report is received while copying a
    report->value is in progress. (CVE-2022-41850)

  - There is an infoleak vulnerability in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_parse_conf_req
    function which can be used to leak kernel pointers remotely. We recommend upgrading past commit
    https://github.com/torvalds/linux/commit/b1a2cd50c0357f243b7435a732b4e62ba3157a2e
    https://www.google.com/url (CVE-2022-42895)

  - An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.18 before 5.18.18. fs/ksmbd/smb2pdu.c
    lacks length validation in the non-padding case in smb2_write. (CVE-2022-47940)

  - A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the Linux Kernel due to a race
    problem. This flaw leads to a denial of service issue. If patch ebda44da44f6 (net: sched: fix race
    condition in qdisc_graft()) not applied yet, then kernel could be affected. (CVE-2023-0590)

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-5876-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2022-47940");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-3640");

  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:"2022/09/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/02/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/02/16");

  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:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1025-intel-iotg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1029-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1030-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1033-azure-fde");
  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) 2023-2024 Canonical, Inc. / NASL script (C) 2023-2024 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 (! ('20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 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 = {
  '20.04': {
    '5.15.0': {
      'gcp': '5.15.0-1029',
      'aws': '5.15.0-1030'
    }
  },
  '22.04': {
    '5.15.0': {
      'intel-iotg': '5.15.0-1025',
      'gcp': '5.15.0-1029',
      'aws': '5.15.0-1030',
      'azure-fde': '5.15.0-1033'
    }
  }
};

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 = 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-5876-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2022-3543', 'CVE-2022-3619', 'CVE-2022-3623', 'CVE-2022-3628', 'CVE-2022-3640', 'CVE-2022-41849', 'CVE-2022-41850', 'CVE-2022-42895', 'CVE-2022-47940', 'CVE-2023-0590');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-5876-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}