Ubuntu 22.04 LTS : Linux kernel vulnerabilities (USN-5469-1)

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5469-1. 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(161955);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2022-0168",
    "CVE-2022-1048",
    "CVE-2022-1158",
    "CVE-2022-1195",
    "CVE-2022-1198",
    "CVE-2022-1199",
    "CVE-2022-1204",
    "CVE-2022-1205",
    "CVE-2022-1263",
    "CVE-2022-1353",
    "CVE-2022-1516",
    "CVE-2022-1651",
    "CVE-2022-1671",
    "CVE-2022-21499",
    "CVE-2022-28356",
    "CVE-2022-28388",
    "CVE-2022-28389",
    "CVE-2022-28390"
  );
  script_xref(name:"USN", value:"5469-1");

  script_name(english:"Ubuntu 22.04 LTS : Linux kernel vulnerabilities (USN-5469-1)");

  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-5469-1 advisory.

  - A denial of service (DOS) issue was found in the Linux kernel's smb2_ioctl_query_info function in the
    fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user
    function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.
    (CVE-2022-0168)

  - A use-after-free flaw was found in the Linux kernel's sound subsystem in the way a user triggers
    concurrent calls of PCM hw_params. The hw_free ioctls or similar race condition happens inside ALSA PCM
    for other ioctls. This flaw allows a local user to crash or potentially escalate their privileges on the
    system. (CVE-2022-1048)

  - A flaw was found in KVM. When updating a guest's page table entry, vm_pgoff was improperly used as the
    offset to get the page's pfn. As vaddr and vm_pgoff are controllable by user-mode processes, this flaw
    allows unprivileged local users on the host to write outside the userspace region and potentially corrupt
    the kernel, resulting in a denial of service condition. (CVE-2022-1158)

  - A use-after-free vulnerability was found in the Linux kernel in drivers/net/hamradio. This flaw allows a
    local attacker with a user privilege to cause a denial of service (DOS) when the mkiss or sixpack device
    is detached and reclaim resources early. (CVE-2022-1195)

  - A use-after-free vulnerabilitity was discovered in drivers/net/hamradio/6pack.c of linux that allows an
    attacker to crash linux kernel by simulating ax25 device using 6pack driver from user space.
    (CVE-2022-1198)

  - A flaw was found in the Linux kernel. This flaw allows an attacker to crash the Linux kernel by simulating
    amateur radio from the user space, resulting in a null-ptr-deref vulnerability and a use-after-free
    vulnerability. (CVE-2022-1199)

  - A use-after-free flaw was found in the Linux kernel's Amateur Radio AX.25 protocol functionality in the
    way a user connects with the protocol. This flaw allows a local user to crash the system. (CVE-2022-1204)

  - A NULL pointer dereference flaw was found in the Linux kernel's Amateur Radio AX.25 protocol functionality
    in the way a user connects with the protocol. This flaw allows a local user to crash the system.
    (CVE-2022-1205)

  - A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled.
    This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a
    kernel oops condition that results in a denial of service. (CVE-2022-1263)

  - A vulnerability was found in the pfkey_register function in net/key/af_key.c in the Linux kernel. This
    flaw allows a local, unprivileged user to gain access to kernel memory, leading to a system crash or a
    leak of internal kernel information. (CVE-2022-1353)

  - A NULL pointer dereference flaw was found in the Linux kernel's X.25 set of standardized network protocols
    functionality in the way a user terminates their session using a simulated Ethernet card and continued
    usage of this connection. This flaw allows a local user to crash the system. (CVE-2022-1516)

  - A memory leak flaw was found in the Linux kernel in acrn_dev_ioctl in the drivers/virt/acrn/hsm.c function
    in how the ACRN Device Model emulates virtual NICs in VM. This flaw allows a local privileged attacker to
    leak unauthorized kernel information, causing a denial of service. (CVE-2022-1651)

  - A NULL pointer dereference flaw was found in rxrpc_preparse_s in net/rxrpc/server_key.c in the Linux
    kernel. This flaw allows a local attacker to crash the system or leak internal kernel information.
    (CVE-2022-1671)

  - KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown.
    An attacker with access to a serial port could trigger the debugger so it is important that the debugger
    respect the lockdown mode when/if it is triggered. (CVE-2022-21499)

  - In the Linux kernel before 5.17.1, a refcount leak bug was found in net/llc/af_llc.c. (CVE-2022-28356)

  - usb_8dev_start_xmit in drivers/net/can/usb/usb_8dev.c in the Linux kernel through 5.17.1 has a double
    free. (CVE-2022-28388)

  - mcba_usb_start_xmit in drivers/net/can/usb/mcba_usb.c in the Linux kernel through 5.17.1 has a double
    free. (CVE-2022-28389)

  - ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c in the Linux kernel through 5.17.1 has a double free.
    (CVE-2022-28390)

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-5469-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/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-2022-1048");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-28390");

  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:"2022/04/02");
  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:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1007-ibm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1008-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1009-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1010-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1011-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-37-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-37-generic-64k");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-37-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-37-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-37-lowlatency-64k");
  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': {
    '5.15.0': {
      'generic': '5.15.0-37',
      'generic-64k': '5.15.0-37',
      'generic-lpae': '5.15.0-37',
      'lowlatency': '5.15.0-37',
      'lowlatency-64k': '5.15.0-37',
      'ibm': '5.15.0-1007',
      'gcp': '5.15.0-1008',
      'oracle': '5.15.0-1009',
      'azure': '5.15.0-1010',
      'aws': '5.15.0-1011'
    }
  }
};

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 = 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-5469-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2022-0168', 'CVE-2022-1048', 'CVE-2022-1158', 'CVE-2022-1195', 'CVE-2022-1198', 'CVE-2022-1199', 'CVE-2022-1204', 'CVE-2022-1205', 'CVE-2022-1263', 'CVE-2022-1353', 'CVE-2022-1516', 'CVE-2022-1651', 'CVE-2022-1671', 'CVE-2022-21499', 'CVE-2022-28356', 'CVE-2022-28388', 'CVE-2022-28389', 'CVE-2022-28390');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-5469-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}