Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-2965-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2965-1. 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(91082);
  script_version("2.20");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2016-2184",
    "CVE-2016-2185",
    "CVE-2016-2186",
    "CVE-2016-2188",
    "CVE-2016-3136",
    "CVE-2016-3137",
    "CVE-2016-3138",
    "CVE-2016-3140",
    "CVE-2016-3156",
    "CVE-2016-3157",
    "CVE-2016-3672",
    "CVE-2016-3689",
    "CVE-2016-3951",
    "CVE-2016-3955",
    "CVE-2016-4557"
  );
  script_xref(name:"USN", value:"2965-1");

  script_name(english:"Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-2965-1)");

  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 host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-2965-1 advisory.

  - The create_fixed_stream_quirk function in sound/usb/quirks.c in the snd-usb-audio driver in the Linux
    kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer
    dereference or double free, and system crash) via a crafted endpoints value in a USB device descriptor.
    (CVE-2016-2184)

  - The ati_remote2_probe function in drivers/input/misc/ati_remote2.c in the Linux kernel before 4.5.1 allows
    physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash)
    via a crafted endpoints value in a USB device descriptor. (CVE-2016-2185)

  - The powermate_probe function in drivers/input/misc/powermate.c in the Linux kernel before 4.5.1 allows
    physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash)
    via a crafted endpoints value in a USB device descriptor. (CVE-2016-2186)

  - The iowarrior_probe function in drivers/usb/misc/iowarrior.c in the Linux kernel before 4.5.1 allows
    physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash)
    via a crafted endpoints value in a USB device descriptor. (CVE-2016-2188)

  - The mct_u232_msr_to_state function in drivers/usb/serial/mct_u232.c in the Linux kernel before 4.5.1
    allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system
    crash) via a crafted USB device without two interrupt-in endpoint descriptors. (CVE-2016-3136)

  - drivers/usb/serial/cypress_m8.c in the Linux kernel before 4.5.1 allows physically proximate attackers to
    cause a denial of service (NULL pointer dereference and system crash) via a USB device without both an
    interrupt-in and an interrupt-out endpoint descriptor, related to the cypress_generic_port_probe and
    cypress_open functions. (CVE-2016-3137)

  - The acm_probe function in drivers/usb/class/cdc-acm.c in the Linux kernel before 4.5.1 allows physically
    proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a USB
    device without both a control and a data endpoint descriptor. (CVE-2016-3138)

  - The digi_port_init function in drivers/usb/serial/digi_acceleport.c in the Linux kernel before 4.5.1
    allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system
    crash) via a crafted endpoints value in a USB device descriptor. (CVE-2016-3140)

  - The IPv4 implementation in the Linux kernel before 4.5.2 mishandles destruction of device objects, which
    allows guest OS users to cause a denial of service (host OS networking outage) by arranging for a large
    number of IP addresses. (CVE-2016-3156)

  - The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-
    switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial
    of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
    (CVE-2016-3157)

  - The arch_pick_mmap_layout function in arch/x86/mm/mmap.c in the Linux kernel through 4.5.2 does not
    properly randomize the legacy base address, which makes it easier for local users to defeat the intended
    restrictions on the ADDR_NO_RANDOMIZE flag, and bypass the ASLR protection mechanism for a setuid or
    setgid program, by disabling stack-consumption resource limits. (CVE-2016-3672)

  - The ims_pcu_parse_cdc_data function in drivers/input/misc/ims-pcu.c in the Linux kernel before 4.5.1
    allows physically proximate attackers to cause a denial of service (system crash) via a USB device without
    both a master and a slave interface. (CVE-2016-3689)

  - Double free vulnerability in drivers/net/usb/cdc_ncm.c in the Linux kernel before 4.5 allows physically
    proximate attackers to cause a denial of service (system crash) or possibly have unspecified other impact
    by inserting a USB device with an invalid USB descriptor. (CVE-2016-3951)

  - The usbip_recv_xbuff function in drivers/usb/usbip/usbip_common.c in the Linux kernel before 4.5.3 allows
    remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other
    impact via a crafted length value in a USB/IP packet. (CVE-2016-3955)

  - The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does
    not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial
    of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.
    (CVE-2016-4557)

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-2965-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/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-2016-3955");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Linux BPF doubleput UAF Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc-e500mc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc-smp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc64-emb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc64-smp");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-: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) 2016-2024 Canonical, Inc. / NASL script (C) 2016-2024 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)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04', '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': {
    '4.4.0': {
      'generic': '4.4.0-22',
      'generic-lpae': '4.4.0-22',
      'lowlatency': '4.4.0-22',
      'powerpc-e500mc': '4.4.0-22',
      'powerpc-smp': '4.4.0-22',
      'powerpc64-emb': '4.4.0-22',
      'powerpc64-smp': '4.4.0-22'
    }
  }
};

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-2965-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2016-2184', 'CVE-2016-2185', 'CVE-2016-2186', 'CVE-2016-2188', 'CVE-2016-3136', 'CVE-2016-3137', 'CVE-2016-3138', 'CVE-2016-3140', 'CVE-2016-3156', 'CVE-2016-3157', 'CVE-2016-3672', 'CVE-2016-3689', 'CVE-2016-3951', 'CVE-2016-3955', 'CVE-2016-4557');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-2965-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}