OracleVM 3.4 : xen (OVMSA-2018-0221)

#
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from OracleVM
# Security Advisory OVMSA-2018-0221.
#

include("compat.inc");

if (description)
{
  script_id(109989);
  script_version("1.10");
  script_cvs_date("Date: 2019/09/27 13:00:35");

  script_cve_id("CVE-2017-17565", "CVE-2017-17566", "CVE-2018-10981", "CVE-2018-10982", "CVE-2018-8897");

  script_name(english:"OracleVM 3.4 : xen (OVMSA-2018-0221)");
  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 :

  - BUILDINFO: OVMF
    commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8

  - BUILDINFO: xen
    commit=5ee0a217664a1fde547afa506e92e4998ed26699

  - BUILDINFO: QEMU upstream
    commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

  - BUILDINFO: QEMU traditional
    commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

  - BUILDINFO: IPXE
    commit=9a93db3f0947484e30e753bbd61a10b17336e20e

  - BUILDINFO: SeaBIOS
    commit=7d9cbe613694924921ed1a6f8947d711c5832eee

  - Red-tape: Update the repo with CVE XSA-262 (Boris
    Ostrovsky) [Orabug: 27948889] (CVE-2018-10981)

  - Red-tape: Update the repo with CVE XSA-261 (Boris
    Ostrovsky) [Orabug: 27948864] (CVE-2018-10982)

  - BUILDINFO: OVMF
    commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8

  - BUILDINFO: xen
    commit=a20dadee84429112c3b5f245180f72d990063d20

  - BUILDINFO: QEMU upstream
    commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

  - BUILDINFO: QEMU traditional
    commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

  - BUILDINFO: IPXE
    commit=9a93db3f0947484e30e753bbd61a10b17336e20e

  - BUILDINFO: SeaBIOS
    commit=7d9cbe613694924921ed1a6f8947d711c5832eee

  - x86/HVM: guard against emulator driving ioreq state in
    weird ways (Jan Beulich) [Orabug: 27948889]

  - x86/vpt: add support for IO-APIC routed interrupts (Xen
    Project Security Team) [Orabug: 27948864]

  - BUILDINFO: OVMF
    commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8

  - BUILDINFO: xen
    commit=c6b30b4f49430b1314928a4d98a5e9e754895e4d

  - BUILDINFO: QEMU upstream
    commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

  - BUILDINFO: QEMU traditional
    commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

  - BUILDINFO: IPXE
    commit=9a93db3f0947484e30e753bbd61a10b17336e20e

  - BUILDINFO: SeaBIOS
    commit=7d9cbe613694924921ed1a6f8947d711c5832eee

  - vnuma: unset smt even if vnuma is off (Elena Ufimtseva)
    [Orabug: 27950640]

  - x86/paging: don't unconditionally BUG on finding
    SHARED_M2P_ENTRY (Jan Beulich) [Orabug: 27965254]
    (CVE-2017-17565)

  - x86/mm: don't wrongly set page ownership (Jan Beulich)
    [Orabug: 27965236] (CVE-2017-17566)

  - misc/xenmicrocode: Upload /lib/firmware/<some blob> to
    the hypervisor (Konrad Rzeszutek Wilk) [Orabug:
    27957822]

  - BUILDINFO: OVMF
    commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8

  - BUILDINFO: xen
    commit=75ac5267506600d4587b80daae6bb694099e2c03

  - BUILDINFO: QEMU upstream
    commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

  - BUILDINFO: QEMU traditional
    commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

  - BUILDINFO: IPXE
    commit=9a93db3f0947484e30e753bbd61a10b17336e20e

  - BUILDINFO: SeaBIOS
    commit=7d9cbe613694924921ed1a6f8947d711c5832eee

  - x86/traps: Fix handling of #DB exceptions in hypervisor
    context (Andrew Cooper) [Orabug: 27963989]
    (CVE-2018-8897)

  - x86/traps: Use an Interrupt Stack Table for #DB (Andrew
    Cooper) [Orabug: 27963989] (CVE-2018-8897)

  - x86/pv: Move exception injection into
    [,compat_]test_all_events (Andrew Cooper) [Orabug:
    27963989] (CVE-2018-8897)

  - x86/traps: Fix %dr6 handing in #DB handler (Andrew
    Cooper) [Orabug: 27963989] (CVE-2018-8897)

  - x86/traps: Misc non-functional improvements to
    set_debugreg (Andrew Cooper) [Orabug: 27963989]
    (CVE-2018-8897)

  - x86/pv: Several bugs in set_debugreg (Ross Philipson)
    [Orabug: 27963989] (CVE-2018-8897)

  - x86/pv: The do_get_debugreg CR4.DE condition is
    inverted. (Ross Philipson) [Orabug: 27963989]
    (CVE-2018-8897)

  - BUILDINFO: OVMF
    commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8

  - BUILDINFO: xen
    commit=d787e7a9d35cc2880b525f1d7a35f27969590f4c

  - BUILDINFO: QEMU upstream
    commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

  - BUILDINFO: QEMU traditional
    commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

  - BUILDINFO: IPXE
    commit=9a93db3f0947484e30e753bbd61a10b17336e20e

  - BUILDINFO: SeaBIOS
    commit=7d9cbe613694924921ed1a6f8947d711c5832eee

  - vnuma: don't turn on smt for odd number of vcpus (Elena
    Ufimtseva)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/oraclevm-errata/2018-May/000857.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected xen / xen-tools packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  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:"metasploit_name", value:'Microsoft Windows POP/MOV SS Local Privilege Elevation Vulnerability');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/23");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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_exists(rpm:"xen-4.4.4-155", release:"OVS3.4") && rpm_check(release:"OVS3.4", reference:"xen-4.4.4-155.0.36.el6")) flag++;
if (rpm_exists(rpm:"xen-tools-4.4.4-155", release:"OVS3.4") && rpm_check(release:"OVS3.4", reference:"xen-tools-4.4.4-155.0.36.el6")) 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, "xen / xen-tools");
}