Ubuntu 20.04 LTS : Linux kernel (Intel IOTG) vulnerabilities (USN-5362-1)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5362-1. 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(159395);
  script_version("1.14");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2021-4083",
    "CVE-2021-4090",
    "CVE-2021-4155",
    "CVE-2021-42327",
    "CVE-2022-0001",
    "CVE-2022-0185",
    "CVE-2022-0330",
    "CVE-2022-0435",
    "CVE-2022-0492",
    "CVE-2022-0516",
    "CVE-2022-0742",
    "CVE-2022-0847",
    "CVE-2022-22942",
    "CVE-2022-23222",
    "CVE-2022-23960",
    "CVE-2022-25636"
  );
  script_xref(name:"USN", value:"5362-1");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2024/09/11");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/16");

  script_name(english:"Ubuntu 20.04 LTS : Linux kernel (Intel IOTG) vulnerabilities (USN-5362-1)");

  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 host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-5362-1 advisory.

    Nick Gregory discovered that the Linux kernel incorrectly handled network offload functionality. A local
    attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2022-25636)

    Enrico Barberis, Pietro Frigo, Marius Muench, Herbert Bos, and Cristiano Giuffrida discovered that
    hardware mitigations added by ARM to their processors to address Spectre-BTI were insufficient. A local
    attacker could potentially use this to expose sensitive information. (CVE-2022-23960)

    It was discovered that the BPF verifier in the Linux kernel did not properly restrict pointer types in
    certain situations. A local attacker could use this to cause a denial of service (system crash) or
    possibly execute arbitrary code. (CVE-2022-23222)

    Max Kellermann discovered that the Linux kernel incorrectly handled Unix pipes. A local attacker could
    potentially use this to modify any file that could be opened for reading. (CVE-2022-0847)

    Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the Linux kernel did not properly
    restrict access to the cgroups v1 release_agent feature. A local attacker could use this to gain
    administrative privileges. (CVE-2022-0492)

    William Liu and Jamie Hill-Daniel discovered that the file system context functionality in the Linux
    kernel contained an integer underflow vulnerability, leading to an out-of-bounds write. A local attacker
    could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-0185)

    Enrico Barberis, Pietro Frigo, Marius Muench, Herbert Bos, and Cristiano Giuffrida discovered that
    hardware mitigations added by Intel to their processors to address Spectre-BTI were insufficient. A local
    attacker could potentially use this to expose sensitive information. (CVE-2022-0001)

    Jann Horn discovered a race condition in the Unix domain socket implementation in the Linux kernel that
    could result in a read-after-free. A local attacker could use this to cause a denial of service (system
    crash) or possibly execute arbitrary code. (CVE-2021-4083)

    It was discovered that the NFS server implementation in the Linux kernel contained an out-of-bounds write
    vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly
    execute arbitrary code. (CVE-2021-4090)

    Kirill Tkhai discovered that the XFS file system implementation in the Linux kernel did not calculate size
    correctly when pre-allocating space in some situations. A local attacker could use this to expose
    sensitive information. (CVE-2021-4155)

    It was discovered that the AMD Radeon GPU driver in the Linux kernel did not properly validate writes in
    the debugfs file system. A privileged attacker could use this to cause a denial of service (system crash)
    or possibly execute arbitrary code. (CVE-2021-42327)

    Sushma Venkatesh Reddy discovered that the Intel i915 graphics driver in the Linux kernel did not perform
    a GPU TLB flush in some situations. A local attacker could use this to cause a denial of service or
    possibly execute arbitrary code. (CVE-2022-0330)

    Samuel Page discovered that the Transparent Inter-Process Communication (TIPC) protocol implementation in
    the Linux kernel contained a stack-based buffer overflow. A remote attacker could use this to cause a
    denial of service (system crash) for systems that have a TIPC bearer configured. (CVE-2022-0435)

    It was discovered that the KVM implementation for s390 systems in the Linux kernel did not properly
    prevent memory operations on PVM guests that were in non-protected mode. A local attacker could use this
    to obtain unauthorized memory write access. (CVE-2022-0516)

    It was discovered that the ICMPv6 implementation in the Linux kernel did not properly deallocate memory in
    certain situations. A remote attacker could possibly use this to cause a denial of service (memory
    exhaustion). (CVE-2022-0742)

    It was discovered that the VMware Virtual GPU driver in the Linux kernel did not properly handle certain
    failure conditions, leading to a stale entry in the file descriptor table. A local attacker could use this
    to expose sensitive information or possibly gain administrative privileges. (CVE-2022-22942)

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-5362-1");
  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:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/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-2022-0435");

  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:'Dirty Pipe Local Privilege Escalation via CVE-2022-0847');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/01/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/04/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/04/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-1010-intel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-: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("linux_alt_patch_detect.nasl", "ssh_get_info.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)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04', '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': {
    '5.13.0': {
      'intel': '5.13.0-1010'
    }
  }
};

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-5362-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2021-4083', 'CVE-2021-4090', 'CVE-2021-4155', 'CVE-2021-42327', 'CVE-2022-0001', 'CVE-2022-0185', 'CVE-2022-0330', 'CVE-2022-0435', 'CVE-2022-0492', 'CVE-2022-0516', 'CVE-2022-0742', 'CVE-2022-0847', 'CVE-2022-22942', 'CVE-2022-23222', 'CVE-2022-23960', 'CVE-2022-25636');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-5362-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}