Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3361-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3361-1. 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(101929);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2015-1350",
    "CVE-2016-10208",
    "CVE-2016-8405",
    "CVE-2016-8636",
    "CVE-2016-9083",
    "CVE-2016-9084",
    "CVE-2016-9191",
    "CVE-2016-9604",
    "CVE-2016-9755",
    "CVE-2017-2583",
    "CVE-2017-2584",
    "CVE-2017-2596",
    "CVE-2017-2618",
    "CVE-2017-2671",
    "CVE-2017-5546",
    "CVE-2017-5549",
    "CVE-2017-5550",
    "CVE-2017-5551",
    "CVE-2017-5576",
    "CVE-2017-5669",
    "CVE-2017-5897",
    "CVE-2017-5970",
    "CVE-2017-6001",
    "CVE-2017-6214",
    "CVE-2017-6345",
    "CVE-2017-6346",
    "CVE-2017-6347",
    "CVE-2017-6348",
    "CVE-2017-7187",
    "CVE-2017-7261",
    "CVE-2017-7273",
    "CVE-2017-7472",
    "CVE-2017-7616",
    "CVE-2017-7618",
    "CVE-2017-7645",
    "CVE-2017-7889",
    "CVE-2017-7895",
    "CVE-2017-8924",
    "CVE-2017-8925",
    "CVE-2017-9150"
  );
  script_xref(name:"USN", value:"3361-1");

  script_name(english:"Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3361-1)");

  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-3361-1 advisory.

  - The VFS subsystem in the Linux kernel 3.x provides an incomplete set of requirements for setattr
    operations that underspecifies removing extended privilege attributes, which allows local users to cause a
    denial of service (capability stripping) via a failed invocation of a system call, as demonstrated by
    using chown to remove a capability from the ping or Wireshark dumpcap program. (CVE-2015-1350)

  - The ext4_fill_super function in fs/ext4/super.c in the Linux kernel through 4.9.8 does not properly
    validate meta block groups, which allows physically proximate attackers to cause a denial of service (out-
    of-bounds read and system crash) via a crafted ext4 image. (CVE-2016-10208)

  - An information disclosure vulnerability in kernel components including the ION subsystem, Binder, USB
    driver and networking subsystem could enable a local malicious application to access data outside of its
    permission levels. This issue is rated as Moderate because it first requires compromising a privileged
    process. Product: Android. Versions: Kernel-3.10, Kernel-3.18. Android ID: A-31651010. (CVE-2016-8405)

  - Integer overflow in the mem_check_range function in drivers/infiniband/sw/rxe/rxe_mr.c in the Linux kernel
    before 4.9.10 allows local users to cause a denial of service (memory corruption), obtain sensitive
    information from kernel memory, or possibly have unspecified other impact via a write or read request
    involving the RDMA protocol over infiniband (aka Soft RoCE) technology. (CVE-2016-8636)

  - drivers/vfio/pci/vfio_pci.c in the Linux kernel through 4.8.11 allows local users to bypass integer
    overflow checks, and cause a denial of service (memory corruption) or have unspecified other impact, by
    leveraging access to a vfio PCI device file for a VFIO_DEVICE_SET_IRQS ioctl call, aka a state machine
    confusion bug. (CVE-2016-9083)

  - drivers/vfio/pci/vfio_pci_intrs.c in the Linux kernel through 4.8.11 misuses the kzalloc function, which
    allows local users to cause a denial of service (integer overflow) or have unspecified other impact by
    leveraging access to a vfio PCI device file. (CVE-2016-9084)

  - The cgroup offline implementation in the Linux kernel through 4.8.11 mishandles certain drain operations,
    which allows local users to cause a denial of service (system hang) by leveraging access to a container
    environment for executing a crafted application, as demonstrated by trinity. (CVE-2016-9191)

  - It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal
    keyring, such as '.dns_resolver' in RHEL-7 or '.builtin_trusted_keys' upstream, by joining it as its
    session keyring. This allows root to bypass module signature verification by adding a new public key of
    its own devising to the keyring. (CVE-2016-9604)

  - The netfilter subsystem in the Linux kernel before 4.9 mishandles IPv6 reassembly, which allows local
    users to cause a denial of service (integer overflow, out-of-bounds write, and GPF) or possibly have
    unspecified other impact via a crafted application that makes socket, connect, and writev system calls,
    related to net/ipv6/netfilter/nf_conntrack_reasm.c and net/ipv6/netfilter/nf_defrag_ipv6_hooks.c.
    (CVE-2016-9755)

  - The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel before 4.9.5
    improperly emulates a MOV SS, NULL selector instruction, which allows guest OS users to cause a denial
    of service (guest OS crash) or gain guest OS privileges via a crafted application. (CVE-2017-2583)

  - arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive
    information from kernel memory or cause a denial of service (use-after-free) via a crafted application
    that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt. (CVE-2017-2584)

  - The nested_vmx_check_vmptr function in arch/x86/kvm/vmx.c in the Linux kernel through 4.9.8 improperly
    emulates the VMXON instruction, which allows KVM L1 guest OS users to cause a denial of service (host OS
    memory consumption) by leveraging the mishandling of page references. (CVE-2017-2596)

  - A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files
    before 4.9.10. An empty (null) write to this file can crash the system by causing the system to attempt to
    access unmapped kernel memory. (CVE-2017-2618)

  - The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a
    certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local
    users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a
    socket system call. (CVE-2017-2671)

  - The freelist-randomization feature in mm/slab.c in the Linux kernel 4.8.x and 4.9.x before 4.9.5 allows
    local users to cause a denial of service (duplicate freelist entries and system crash) or possibly have
    unspecified other impact in opportunistic circumstances by leveraging the selection of a large value for a
    random number. (CVE-2017-5546)

  - The klsi_105_get_line_state function in drivers/usb/serial/kl5kusb105.c in the Linux kernel before 4.9.5
    places uninitialized heap-memory contents into a log entry upon a failure to read the line status, which
    allows local users to obtain sensitive information by reading the log. (CVE-2017-5549)

  - Off-by-one error in the pipe_advance function in lib/iov_iter.c in the Linux kernel before 4.9.5 allows
    local users to obtain sensitive information from uninitialized heap-memory locations in opportunistic
    circumstances by reading from a pipe after an incorrect buffer-release decision. (CVE-2017-5550)

  - The simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit
    during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by
    leveraging the existence of a setgid program with restrictions on execute permissions. NOTE: this
    vulnerability exists because of an incomplete fix for CVE-2016-7097. (CVE-2017-5551)

  - Integer overflow in the vc4_get_bcl function in drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM driver
    in the Linux kernel before 4.9.7 allows local users to cause a denial of service or possibly have
    unspecified other impact via a crafted size value in a VC4_SUBMIT_CL ioctl call. (CVE-2017-5576)

  - The do_shmat function in ipc/shm.c in the Linux kernel through 4.9.12 does not restrict the address
    calculated by a certain rounding operation, which allows local users to map page zero, and consequently
    bypass a protection mechanism that exists for the mmap system call, by making crafted shmget and shmat
    system calls in a privileged context. (CVE-2017-5669)

  - The ip6gre_err function in net/ipv6/ip6_gre.c in the Linux kernel allows remote attackers to have
    unspecified impact via vectors involving GRE flags in an IPv6 packet, which trigger an out-of-bounds
    access. (CVE-2017-5897)

  - The ipv4_pktinfo_prepare function in net/ipv4/ip_sockglue.c in the Linux kernel through 4.9.9 allows
    attackers to cause a denial of service (system crash) via (1) an application that makes crafted system
    calls or possibly (2) IPv4 traffic with invalid IP options. (CVE-2017-5970)

  - Race condition in kernel/events/core.c in the Linux kernel before 4.9.7 allows local users to gain
    privileges via a crafted application that makes concurrent perf_event_open system calls for moving a
    software group into a hardware context. NOTE: this vulnerability exists because of an incomplete fix for
    CVE-2016-6786. (CVE-2017-6001)

  - The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel before 4.9.11 allows remote attackers
    to cause a denial of service (infinite loop and soft lockup) via vectors involving a TCP packet with the
    URG flag. (CVE-2017-6214)

  - The LLC subsystem in the Linux kernel before 4.9.13 does not ensure that a certain destructor exists in
    required circumstances, which allows local users to cause a denial of service (BUG_ON) or possibly have
    unspecified other impact via crafted system calls. (CVE-2017-6345)

  - Race condition in net/packet/af_packet.c in the Linux kernel before 4.9.13 allows local users to cause a
    denial of service (use-after-free) or possibly have unspecified other impact via a multithreaded
    application that makes PACKET_FANOUT setsockopt system calls. (CVE-2017-6346)

  - The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 has
    incorrect expectations about skb data layout, which allows local users to cause a denial of service
    (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by
    use of the MSG_MORE flag in conjunction with loopback UDP transmission. (CVE-2017-6347)

  - The hashbin_delete function in net/irda/irqueue.c in the Linux kernel before 4.9.13 improperly manages
    lock dropping, which allows local users to cause a denial of service (deadlock) via crafted operations on
    IrDA devices. (CVE-2017-6348)

  - The sg_ioctl function in drivers/scsi/sg.c in the Linux kernel through 4.10.4 allows local users to cause
    a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a large
    command size in an SG_NEXT_CMD_LEN ioctl call, leading to out-of-bounds write access in the sg_write
    function. (CVE-2017-7187)

  - The vmw_surface_define_ioctl function in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel
    through 4.10.5 does not check for a zero value of certain levels data, which allows local users to cause a
    denial of service (ZERO_SIZE_PTR dereference, and GPF and possibly panic) via a crafted ioctl call for a
    /dev/dri/renderD* device. (CVE-2017-7261)

  - The cp_report_fixup function in drivers/hid/hid-cypress.c in the Linux kernel 3.2 and 4.x before 4.9.4
    allows physically proximate attackers to cause a denial of service (integer underflow) or possibly have
    unspecified other impact via a crafted HID report. (CVE-2017-7273)

  - The KEYS subsystem in the Linux kernel before 4.10.13 allows local users to cause a denial of service
    (memory consumption) via a series of KEY_REQKEY_DEFL_THREAD_KEYRING keyctl_set_reqkey_keyring calls.
    (CVE-2017-7472)

  - Incorrect error handling in the set_mempolicy and mbind compat syscalls in mm/mempolicy.c in the Linux
    kernel through 4.10.9 allows local users to obtain sensitive information from uninitialized stack data by
    triggering failure of a certain bitmap operation. (CVE-2017-7616)

  - crypto/ahash.c in the Linux kernel through 4.10.9 allows attackers to cause a denial of service (API
    operation calling its own callback, and infinite recursion) by triggering EBUSY on a full queue.
    (CVE-2017-7618)

  - The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel through 4.10.11 allows remote attackers
    to cause a denial of service (system crash) via a long RPC reply, related to net/sunrpc/svc.c,
    fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c. (CVE-2017-7645)

  - The mm subsystem in the Linux kernel through 3.2 does not properly enforce the CONFIG_STRICT_DEVMEM
    protection mechanism, which allows local users to read or write to kernel memory locations in the first
    megabyte (and bypass slab-allocation access restrictions) via an application that opens the /dev/mem file,
    related to arch/x86/mm/init.c and drivers/char/mem.c. (CVE-2017-7889)

  - The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lack certain checks for the
    end of a buffer, which allows remote attackers to trigger pointer-arithmetic errors or possibly have
    unspecified other impact via crafted requests, related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.
    (CVE-2017-7895)

  - The edge_bulk_in_callback function in drivers/usb/serial/io_ti.c in the Linux kernel before 4.10.4 allows
    local users to obtain sensitive information (in the dmesg ringbuffer and syslog) from uninitialized kernel
    memory by using a crafted USB device (posing as an io_ti USB serial device) to trigger an integer
    underflow. (CVE-2017-8924)

  - The omninet_open function in drivers/usb/serial/omninet.c in the Linux kernel before 4.10.4 allows local
    users to cause a denial of service (tty exhaustion) by leveraging reference count mishandling.
    (CVE-2017-8925)

  - The do_check function in kernel/bpf/verifier.c in the Linux kernel before 4.11.1 does not make the
    allow_ptr_leaks value available for restricting the output of the print_bpf_insn function, which allows
    local users to obtain sensitive address information via crafted bpf system calls. (CVE-2017-9150)

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-3361-1");
  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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-7895");

  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:"2016/05/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/07/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.10.0-27-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.10.0-27-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.10.0-27-lowlatency");
  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) 2017-2024 Canonical, Inc. / NASL script (C) 2017-2024 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': {
    '4.10.0': {
      'generic': '4.10.0-27',
      'generic-lpae': '4.10.0-27',
      'lowlatency': '4.10.0-27'
    }
  }
};

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-3361-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2015-1350', 'CVE-2016-8405', 'CVE-2016-8636', 'CVE-2016-9083', 'CVE-2016-9084', 'CVE-2016-9191', 'CVE-2016-9604', 'CVE-2016-9755', 'CVE-2016-10208', 'CVE-2017-2583', 'CVE-2017-2584', 'CVE-2017-2596', 'CVE-2017-2618', 'CVE-2017-2671', 'CVE-2017-5546', 'CVE-2017-5549', 'CVE-2017-5550', 'CVE-2017-5551', 'CVE-2017-5576', 'CVE-2017-5669', 'CVE-2017-5897', 'CVE-2017-5970', 'CVE-2017-6001', 'CVE-2017-6214', 'CVE-2017-6345', 'CVE-2017-6346', 'CVE-2017-6347', 'CVE-2017-6348', 'CVE-2017-7187', 'CVE-2017-7261', 'CVE-2017-7273', 'CVE-2017-7472', 'CVE-2017-7616', 'CVE-2017-7618', 'CVE-2017-7645', 'CVE-2017-7889', 'CVE-2017-7895', 'CVE-2017-8924', 'CVE-2017-8925', 'CVE-2017-9150');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-3361-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}