Ubuntu 14.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8635-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8635-1. 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(365452);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/14");

  script_cve_id(
    "CVE-2021-47202",
    "CVE-2021-47354",
    "CVE-2021-47378",
    "CVE-2024-38612",
    "CVE-2024-56643",
    "CVE-2025-27558",
    "CVE-2026-23272",
    "CVE-2026-23455",
    "CVE-2026-31402",
    "CVE-2026-31405",
    "CVE-2026-31414",
    "CVE-2026-31448",
    "CVE-2026-31607",
    "CVE-2026-31637",
    "CVE-2026-31649",
    "CVE-2026-31657",
    "CVE-2026-31659",
    "CVE-2026-31668",
    "CVE-2026-31682",
    "CVE-2026-31685",
    "CVE-2026-43011",
    "CVE-2026-43037",
    "CVE-2026-43038",
    "CVE-2026-43198",
    "CVE-2026-43383",
    "CVE-2026-43407",
    "CVE-2026-43414",
    "CVE-2026-43493",
    "CVE-2026-43499",
    "CVE-2026-43503",
    "CVE-2026-45988",
    "CVE-2026-46043",
    "CVE-2026-46119",
    "CVE-2026-46243",
    "CVE-2026-46266",
    "CVE-2026-46331",
    "CVE-2026-52924",
    "CVE-2026-52931",
    "CVE-2026-52955",
    "CVE-2026-52982",
    "CVE-2026-52986",
    "CVE-2026-53002",
    "CVE-2026-53006",
    "CVE-2026-53045",
    "CVE-2026-53088",
    "CVE-2026-53176",
    "CVE-2026-53225",
    "CVE-2026-53228",
    "CVE-2026-53359"
  );
  script_xref(name:"USN", value:"8635-1");

  script_name(english:"Ubuntu 14.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8635-1)");

  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 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-8635-1 advisory.

    Siebe Devroe, Hlose Gollier, and Mathy Vanhoef discovered that the WiFi implementation in the Linux
    kernel did not properly handle aggregated frames in mesh networks, due to an incorrect fix for
    CVE-2020-24588. A physically proximate attacker could use this issue to inject packets. (CVE-2025-27558)

    It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when
    handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to
    escalate privileges, or possibly escape a container. (CVE-2026-43503)

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to
    compromise the system. This update corrects flaws in the following subsystems:

    - x86 architecture;

    - Cryptographic API;

    - GPU drivers;

    - InfiniBand drivers;

    - Media drivers;

    - NVIDIA Tegra memory controller driver;

    - Network drivers;

    - STMicroelectronics network drivers;

    - NVME drivers;

    - SCSI subsystem;

    - Thermal drivers;

    - USB over IP driver;

    - Ext4 file system;

    - Network file system (NFS) server daemon;

    - SMB network file system;

    - IPv4 networking;

    - Network traffic control;

    - TCP network protocol;

    - Tracing infrastructure;

    - Locking primitives;

    - B.A.T.M.A.N. meshing protocol;

    - Ethernet bridge;

    - Ceph Core library;

    - DCCP (Datagram Congestion Control Protocol);

    - IPv6 networking;

    - Multipath TCP;

    - Netfilter;

    - RxRPC session sockets;

    - SCTP protocol;

    - SMC sockets;

    - X.25 network layer; (CVE-2021-47202, CVE-2021-47354, CVE-2021-47378, CVE-2024-38612, CVE-2024-56643,
    CVE-2026-23272, CVE-2026-23455, CVE-2026-31402, CVE-2026-31405, CVE-2026-31414, CVE-2026-31448,
    CVE-2026-31607, CVE-2026-31637, CVE-2026-31649, CVE-2026-31657, CVE-2026-31659, CVE-2026-31668,
    CVE-2026-31682, CVE-2026-31685, CVE-2026-43011, CVE-2026-43037, CVE-2026-43038, CVE-2026-43198,
    CVE-2026-43383, CVE-2026-43407, CVE-2026-43414, CVE-2026-43493, CVE-2026-43499, CVE-2026-45988,
    CVE-2026-46043, CVE-2026-46119, CVE-2026-46243, CVE-2026-46266, CVE-2026-46331, CVE-2026-52924,
    CVE-2026-52931, CVE-2026-52955, CVE-2026-52982, CVE-2026-52986, CVE-2026-53002, CVE-2026-53006,
    CVE-2026-53045, CVE-2026-53088, CVE-2026-53176, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359)

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-8635-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/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:U/C:N/I:N/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-2024-56643");

  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:'Sample Linux Priv Esc, DescriptionThis exploit module illustrates how a vulnerability could be exploitedin an linux command for priv esc.}');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/07/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1205.220-azure");
  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) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.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 (! ('14.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04', '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 = {
  '14.04': {
    '4.15.0': {
      'azure': '4.15.0-1205.220~14.04.1'
    }
  }
};

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-8635-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2021-47202', 'CVE-2021-47354', 'CVE-2021-47378', 'CVE-2024-38612', 'CVE-2024-56643', 'CVE-2025-27558', 'CVE-2026-23272', 'CVE-2026-23455', 'CVE-2026-31402', 'CVE-2026-31405', 'CVE-2026-31414', 'CVE-2026-31448', 'CVE-2026-31607', 'CVE-2026-31637', 'CVE-2026-31649', 'CVE-2026-31657', 'CVE-2026-31659', 'CVE-2026-31668', 'CVE-2026-31682', 'CVE-2026-31685', 'CVE-2026-43011', 'CVE-2026-43037', 'CVE-2026-43038', 'CVE-2026-43198', 'CVE-2026-43383', 'CVE-2026-43407', 'CVE-2026-43414', 'CVE-2026-43493', 'CVE-2026-43499', 'CVE-2026-43503', 'CVE-2026-45988', 'CVE-2026-46043', 'CVE-2026-46119', 'CVE-2026-46243', 'CVE-2026-46266', 'CVE-2026-46331', 'CVE-2026-52924', 'CVE-2026-52931', 'CVE-2026-52955', 'CVE-2026-52982', 'CVE-2026-52986', 'CVE-2026-53002', 'CVE-2026-53006', 'CVE-2026-53045', 'CVE-2026-53088', 'CVE-2026-53176', 'CVE-2026-53225', 'CVE-2026-53228', 'CVE-2026-53359');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-8635-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}