Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4287-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4287-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(133800);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2019-14615",
    "CVE-2019-15099",
    "CVE-2019-15291",
    "CVE-2019-16229",
    "CVE-2019-16232",
    "CVE-2019-18683",
    "CVE-2019-18786",
    "CVE-2019-18809",
    "CVE-2019-18885",
    "CVE-2019-19057",
    "CVE-2019-19062",
    "CVE-2019-19063",
    "CVE-2019-19071",
    "CVE-2019-19078",
    "CVE-2019-19082",
    "CVE-2019-19227",
    "CVE-2019-19332",
    "CVE-2019-19767",
    "CVE-2019-19965",
    "CVE-2019-20096",
    "CVE-2019-5108",
    "CVE-2020-7053"
  );
  script_xref(name:"USN", value:"4287-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4287-1)");

  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 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-4287-1 advisory.

  - Insufficient control flow in certain data structures for some Intel(R) Processors with Intel(R) Processor
    Graphics may allow an unauthenticated user to potentially enable information disclosure via local access.
    (CVE-2019-14615)

  - drivers/net/wireless/ath/ath10k/usb.c in the Linux kernel through 5.2.8 has a NULL pointer dereference via
    an incomplete address in an endpoint descriptor. (CVE-2019-15099)

  - An issue was discovered in the Linux kernel through 5.2.9. There is a NULL pointer dereference caused by a
    malicious USB device in the flexcop_usb_probe function in the drivers/media/usb/b2c2/flexcop-usb.c driver.
    (CVE-2019-15291)

  - drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c in the Linux kernel 5.2.14 does not check the alloc_workqueue
    return value, leading to a NULL pointer dereference. NOTE: The security community disputes this issues as
    not being serious enough to be deserving a CVE id (CVE-2019-16229)

  - drivers/net/wireless/marvell/libertas/if_sdio.c in the Linux kernel 5.2.14 does not check the
    alloc_workqueue return value, leading to a NULL pointer dereference. (CVE-2019-16232)

  - An issue was discovered in drivers/media/platform/vivid in the Linux kernel through 5.3.8. It is
    exploitable for privilege escalation on some Linux distributions where local users have /dev/video0
    access, but only if the driver happens to be loaded. There are multiple race conditions during streaming
    stopping in this driver (part of the V4L2 subsystem). These issues are caused by wrong mutex locking in
    vivid_stop_generating_vid_cap(), vivid_stop_generating_vid_out(), sdr_cap_stop_streaming(), and the
    corresponding kthreads. At least one of these race conditions leads to a use-after-free. (CVE-2019-18683)

  - In the Linux kernel through 5.3.8, f->fmt.sdr.reserved is uninitialized in rcar_drif_g_fmt_sdr_cap in
    drivers/media/platform/rcar_drif.c, which could cause a memory disclosure problem. (CVE-2019-18786)

  - A memory leak in the af9005_identify_state() function in drivers/media/usb/dvb-usb/af9005.c in the Linux
    kernel through 5.3.9 allows attackers to cause a denial of service (memory consumption), aka
    CID-2289adbfa559. (CVE-2019-18809)

  - fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer
    dereference via a crafted btrfs image because fs_devices->devices is mishandled within find_device, aka
    CID-09ba3bc9dd15. (CVE-2019-18885)

  - Two memory leaks in the mwifiex_pcie_init_evt_ring() function in
    drivers/net/wireless/marvell/mwifiex/pcie.c in the Linux kernel through 5.3.11 allow attackers to cause a
    denial of service (memory consumption) by triggering mwifiex_map_pci_memory() failures, aka
    CID-d10dcb615c8e. (CVE-2019-19057)

  - A memory leak in the crypto_report() function in crypto/crypto_user_base.c in the Linux kernel through
    5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering
    crypto_report_alg() failures, aka CID-ffdde5932042. (CVE-2019-19062)

  - Two memory leaks in the rtl_usb_probe() function in drivers/net/wireless/realtek/rtlwifi/usb.c in the
    Linux kernel through 5.3.11 allow attackers to cause a denial of service (memory consumption), aka
    CID-3f9361695113. (CVE-2019-19063)

  - A memory leak in the rsi_send_beacon() function in drivers/net/wireless/rsi/rsi_91x_mgmt.c in the Linux
    kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering
    rsi_prepare_beacon() failures, aka CID-d563131ef23c. (CVE-2019-19071)

  - A memory leak in the ath10k_usb_hif_tx_sg() function in drivers/net/wireless/ath/ath10k/usb.c in the Linux
    kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering
    usb_submit_urb() failures, aka CID-b8d17e7d93d2. (CVE-2019-19078)

  - Memory leaks in *create_resource_pool() functions under drivers/gpu/drm/amd/display/dc in the Linux kernel
    through 5.3.11 allow attackers to cause a denial of service (memory consumption). This affects the
    dce120_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c, the
    dce110_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c, the
    dce100_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c, the
    dcn10_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c, and the
    dce112_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c, aka
    CID-104c307147ad. (CVE-2019-19082)

  - In the AppleTalk subsystem in the Linux kernel before 5.1, there is a potential NULL pointer dereference
    because register_snap_client may return NULL. This will lead to denial of service in net/appletalk/aarp.c
    and net/appletalk/ddp.c, as demonstrated by unregister_snap_client, aka CID-9804501fa122. (CVE-2019-19227)

  - An out-of-bounds memory write issue was found in the Linux Kernel, version 3.13 through 5.4, in the way
    the Linux kernel's KVM hypervisor handled the 'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID
    features emulated by the KVM hypervisor. A user or process able to access the '/dev/kvm' device could use
    this flaw to crash the system, resulting in a denial of service. (CVE-2019-19332)

  - The Linux kernel before 5.4.2 mishandles ext4_expand_extra_isize, as demonstrated by use-after-free errors
    in __ext4_expand_extra_isize and ext4_xattr_set_entry, related to fs/ext4/inode.c and fs/ext4/super.c, aka
    CID-4ea99936a163. (CVE-2019-19767)

  - In the Linux kernel through 5.4.6, there is a NULL pointer dereference in
    drivers/scsi/libsas/sas_discover.c because of mishandling of port disconnection during discovery, related
    to a PHY down race condition, aka CID-f70267f379b5. (CVE-2019-19965)

  - In the Linux kernel before 5.1, there is a memory leak in __feat_register_sp() in net/dccp/feat.c, which
    may cause denial of service, aka CID-1d3ff0950e2b. (CVE-2019-20096)

  - An exploitable denial-of-service vulnerability exists in the Linux kernel prior to mainline 5.3. An
    attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations
    before the required authentication process has completed. This could lead to different denial-of-service
    scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already
    existing clients in other nearby APs of the same wireless infrastructure. An attacker can forge
    Authentication and Association Request packets to trigger this vulnerability. (CVE-2019-5108)

  - In the Linux kernel 4.14 longterm through 4.14.165 and 4.19 longterm through 4.19.96 (and 5.x before 5.2),
    there is a use-after-free (write) in the i915_ppgtt_close function in drivers/gpu/drm/i915/i915_gem_gtt.c,
    aka CID-7dc40713618c. This is related to i915_gem_context_destroy_ioctl in
    drivers/gpu/drm/i915/i915_gem_context.c. (CVE-2020-7053)

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-4287-1");
  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-2019-18683");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-7053");

  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:"2019/08/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/02/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1033-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1052-gke");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1053-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1055-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1055-raspi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1060-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1071-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1072-snapdragon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-88-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-88-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-88-lowlatency");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-: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) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 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 (! ('16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04', '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 = {
  '16.04': {
    '4.15.0': {
      'generic': '4.15.0-88',
      'generic-lpae': '4.15.0-88',
      'lowlatency': '4.15.0-88',
      'oracle': '4.15.0-1033',
      'gcp': '4.15.0-1055',
      'aws': '4.15.0-1060',
      'azure': '4.15.0-1071'
    }
  },
  '18.04': {
    '4.15.0': {
      'generic': '4.15.0-88',
      'generic-lpae': '4.15.0-88',
      'lowlatency': '4.15.0-88',
      'oracle': '4.15.0-1033',
      'gke': '4.15.0-1052',
      'kvm': '4.15.0-1053',
      'raspi2': '4.15.0-1055',
      'aws': '4.15.0-1060',
      'snapdragon': '4.15.0-1072'
    }
  }
};

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-4287-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2019-5108', 'CVE-2019-14615', 'CVE-2019-15099', 'CVE-2019-15291', 'CVE-2019-16229', 'CVE-2019-16232', 'CVE-2019-18683', 'CVE-2019-18786', 'CVE-2019-18809', 'CVE-2019-18885', 'CVE-2019-19057', 'CVE-2019-19062', 'CVE-2019-19063', 'CVE-2019-19071', 'CVE-2019-19078', 'CVE-2019-19082', 'CVE-2019-19227', 'CVE-2019-19332', 'CVE-2019-19767', 'CVE-2019-19965', 'CVE-2019-20096', 'CVE-2020-7053');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-4287-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}