OracleVM 3.4 : Unbreakable / etc (OVMSA-2018-0010) (Meltdown) (Spectre)

#
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from OracleVM
# Security Advisory OVMSA-2018-0010.
#

include("compat.inc");

if (description)
{
  script_id(106120);
  script_version("3.6");
  script_cvs_date("Date: 2019/09/27 13:00:35");

  script_cve_id("CVE-2017-5715", "CVE-2017-5754");
  script_xref(name:"IAVA", value:"2018-A-0019");
  script_xref(name:"IAVA", value:"2018-A-0020");

  script_name(english:"OracleVM 3.4 : Unbreakable / etc (OVMSA-2018-0010) (Meltdown) (Spectre)");
  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 :

  - x86/pti/efi: broken conversion from efi to kernel page
    table (Pavel Tatashin) [Orabug: 27363926] [Orabug:
    27352353] (CVE-2017-5754)

  - x86/spec: Always set IBRS to guest value on VMENTER and
    host on VMEXIT (redux) (Konrad Rzeszutek Wilk) [Orabug:
    27369994]

  - x86/IBRS: Make sure we restore MSR_IA32_SPEC_CTRL to a
    valid value (Boris Ostrovsky) [Orabug: 27362581]

  - x86/IBRS/IBPB: Set sysctl_ibrs/ibpb_enabled properly
    (Boris Ostrovsky) [Orabug: 27363792]

  - x86/spec_ctrl: Add missing 'lfence' when IBRS is not
    supported. (Konrad Rzeszutek Wilk) [Orabug: 27339995]
    (CVE-2017-5715)

  - x86/entry_64: TRACE_IRQS_OFF before re-enabling. (Jamie
    Iles) [Orabug: 27339995] (CVE-2017-5715)

  - ptrace: remove unlocked RCU dereference. (Jamie Iles)
    [Orabug: 27339995] (CVE-2017-5715)

  - x86/ia32: Adds code hygiene for 32bit SYSCALL
    instruction entry. (Konrad Rzeszutek Wilk) [Orabug:
    27339995] (CVE-2017-5715)

  - x86/ia32: don't save registers on audit call (Konrad
    Rzeszutek Wilk) [Orabug: 27339995] (CVE-2017-5715)

  - x86/spec/ia32: Sprinkle IBRS and RSB at the 32-bit
    SYSCALL (Konrad Rzeszutek Wilk) [Orabug: 27339995]
    (CVE-2017-5715)

  - x86/ia32: Move STUFF_RSB And ENABLE_IBRS (Konrad
    Rzeszutek Wilk) [Orabug: 27339995] (CVE-2017-5715)

  - x86/spec: Always set IBRS to guest value on VMENTER and
    host on VMEXIT. (Konrad Rzeszutek Wilk) [Orabug:
    27365544] (CVE-2017-5715)"
  );
  # https://oss.oracle.com/pipermail/oraclevm-errata/2018-January/000820.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?fbc9b05d"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected kernel-uek / kernel-uek-firmware packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/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:"exploited_by_malware", 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:"2018/01/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/18");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 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-4.1.12-112.14.11.el6uek")) flag++;
if (rpm_check(release:"OVS3.4", reference:"kernel-uek-firmware-4.1.12-112.14.11.el6uek")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(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");
}