Vulnerabilities > CVE-2017-6345 - Improper Input Validation vulnerability in Linux Kernel

#
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from OracleVM
# Security Advisory OVMSA-2017-0056.
#

include("compat.inc");

if (description)
{
  script_id(99162);
  script_version("3.4");
  script_cvs_date("Date: 2019/09/27 13:00:35");

  script_cve_id("CVE-2015-8952", "CVE-2016-10088", "CVE-2016-10147", "CVE-2016-3140", "CVE-2016-3672", "CVE-2016-3951", "CVE-2016-7097", "CVE-2016-7425", "CVE-2016-8399", "CVE-2016-8632", "CVE-2016-8633", "CVE-2016-8645", "CVE-2016-9178", "CVE-2016-9588", "CVE-2016-9644", "CVE-2016-9756", "CVE-2017-2596", "CVE-2017-2636", "CVE-2017-5897", "CVE-2017-5970", "CVE-2017-6001", "CVE-2017-6345", "CVE-2017-7187");

  script_name(english:"OracleVM 3.4 : Unbreakable / etc (OVMSA-2017-0056)");
  script_summary(english:"Checks the RPM output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote OracleVM host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote OracleVM system is missing necessary patches to address
critical security updates :

  - Revert 'x86/mm: Expand the exception table logic to
    allow new handling options' (Brian Maly) [Orabug:
    25790387] (CVE-2016-9644)

  - Revert 'fix minor infoleak in get_user_ex' (Brian Maly)
    [Orabug: 25790387] (CVE-2016-9644)

  - x86/mm: Expand the exception table logic to allow new
    handling options (Tony Luck) [Orabug: 25790387]
    (CVE-2016-9644)

  - rebuild bumping release

  - net: ping: check minimum size on ICMP header length
    (Kees Cook) [Orabug: 25766898] (CVE-2016-8399)
    (CVE-2016-8399)

  - sg_write/bsg_write is not fit to be called under
    KERNEL_DS (Al Viro) [Orabug: 25765436] (CVE-2016-10088)

  - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter
    chang) [Orabug: 25751984] (CVE-2017-7187)

  - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander
    Popov) [Orabug: 25696677] (CVE-2017-2636)

  - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby)
    [Orabug: 25696677] (CVE-2017-2636)

  - If Slot Status indicates changes in both Data Link Layer
    Status and Presence Detect, prioritize the Link status
    change. (Jack Vogel) 

  - PCI: pciehp: Leave power indicator on when enabling
    already-enabled slot (Ashok Raj) [Orabug: 25353783]

  - firewire: net: guard against rx buffer overflows (Stefan
    Richter) [Orabug: 25451520] (CVE-2016-8633)

  - usbnet: cleanup after bind in probe (Oliver Neukum)
    [Orabug: 25463898] (CVE-2016-3951)

  - cdc_ncm: do not call usbnet_link_change from
    cdc_ncm_bind (Bj&oslash rn Mork) [Orabug: 25463898]
    (CVE-2016-3951)

  - cdc_ncm: Add support for moving NDP to end of NCM frame
    (Enrico Mioso) [Orabug: 25463898] (CVE-2016-3951)

  - x86/mm/32: Enable full randomization on i386 and X86_32
    (Hector Marco-Gisbert) [Orabug: 25463918]
    (CVE-2016-3672)

  - kvm: fix page struct leak in handle_vmon (Paolo Bonzini)
    [Orabug: 25507133] (CVE-2017-2596)

  - crypto: mcryptd - Check mcryptd algorithm compatibility
    (tim) [Orabug: 25507153] (CVE-2016-10147)

  - kvm: nVMX: Allow L1 to intercept software exceptions
    (#BP and #OF) (Jim Mattson) [Orabug: 25507188]
    (CVE-2016-9588)

  - KVM: x86: drop error recovery in em_jmp_far and
    em_ret_far (Radim Kr&#x10D m&aacute &#x159 ) [Orabug:
    25507213] (CVE-2016-9756)

  - tcp: take care of truncations done by sk_filter (Eric
    Dumazet) [Orabug: 25507226] (CVE-2016-8645)

  - rose: limit sk_filter trim to payload (Willem de Bruijn)
    [Orabug: 25507226] (CVE-2016-8645)

  - tipc: check minimum bearer MTU (Michal Kube&#x10D ek)
    [Orabug: 25507239] (CVE-2016-8632) (CVE-2016-8632)

  - fix minor infoleak in get_user_ex (Al Viro) [Orabug:
    25507269] (CVE-2016-9178)

  - scsi: arcmsr: Simplify user_len checking (Borislav
    Petkov) [Orabug: 25507319] (CVE-2016-7425)

  - scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer
    (Dan Carpenter) [Orabug: 25507319] (CVE-2016-7425)

  - tmpfs: clear S_ISGID when setting posix ACLs (Gu Zheng)
    [Orabug: 25507341] (CVE-2016-7097) (CVE-2016-7097)

  - posix_acl: Clear SGID bit when setting file permissions
    (Jan Kara) [Orabug: 25507341] (CVE-2016-7097)
    (CVE-2016-7097)

  - ext2: convert to mbcache2 (Jan Kara) [Orabug: 25512366]
    (CVE-2015-8952)

  - ext4: convert to mbcache2 (Jan Kara) [Orabug: 25512366]
    (CVE-2015-8952)

  - mbcache2: reimplement mbcache (Jan Kara) [Orabug:
    25512366] (CVE-2015-8952)

  - USB: digi_acceleport: do sanity checking for the number
    of ports (Oliver Neukum) [Orabug: 25512466]
    (CVE-2016-3140)

  - net/llc: avoid BUG_ON in skb_orphan (Eric Dumazet)
    [Orabug: 25682419] (CVE-2017-6345)

  - net/mlx4_core: Disallow creation of RAW QPs on a VF (Eli
    Cohen) 

  - ipv4: keep skb->dst around in presence of IP options
    (Eric Dumazet) [Orabug: 25698300] (CVE-2017-5970)

  - perf/core: Fix concurrent sys_perf_event_open vs.
    'move_group' race (Peter Zijlstra) [Orabug: 25698751]
    (CVE-2017-6001)

  - ip6_gre: fix ip6gre_err invalid reads (Eric Dumazet)
    [Orabug: 25699015] (CVE-2017-5897)

  - mpt3sas: Don't spam logs if logging level is 0 (Johannes
    Thumshirn) 

  - xen-netfront: cast grant table reference first to type
    int (Dongli Zhang)

  - xen-netfront: do not cast grant table reference to
    signed short (Dongli Zhang)"
  );
  # https://oss.oracle.com/pipermail/oraclevm-errata/2017-April/000674.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?32b057e2"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected kernel-uek / kernel-uek-firmware packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/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: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:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:kernel-uek");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:kernel-uek-firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:vm_server:3.4");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/04/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/03");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"OracleVM Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleVM/release", "Host/OracleVM/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/OracleVM/release");
if (isnull(release) || "OVS" >!< release) audit(AUDIT_OS_NOT, "OracleVM");
if (! preg(pattern:"^OVS" + "3\.4" + "(\.[0-9]|$)", string:release)) audit(AUDIT_OS_NOT, "OracleVM 3.4", "OracleVM " + release);
if (!get_kb_item("Host/OracleVM/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "OracleVM", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"OVS3.4", reference:"kernel-uek-4.1.12-61.1.33.el6uek")) flag++;
if (rpm_check(release:"OVS3.4", reference:"kernel-uek-firmware-4.1.12-61.1.33.el6uek")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel-uek / kernel-uek-firmware");
}