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nessusThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.ORACLEVM_OVMSA-2018-0246.NASL
HistoryAug 16, 2018 - 12:00 a.m.

OracleVM 3.4 : xen (OVMSA-2018-0246) (Foreshadow)

2018-08-1600:00:00
This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
19

CVSS2

4.7

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:C/I:N/A:N

CVSS3

5.6

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS

0.002

Percentile

64.5%

The remote OracleVM system is missing necessary patches to address critical security updates :

  • BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8

  • BUILDINFO: xen commit=02cec92b3eb1612e37616b10400d82f1e3d8de85

  • BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

  • BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

  • BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e

  • BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee

  • l1tf: Utility to offline/online SMT siblings. (Ross Philipson) [Orabug: 28487050] (CVE-2018-3646)

  • x86/spec-ctrl: Introduce an option to control L1D_FLUSH for HVM guests (Andrew Cooper) [Orabug: 28487050] (CVE-2018-3620) (CVE-2018-3646)

  • x86/msr: Virtualise MSR_FLUSH_CMD for guests (Andrew Cooper) [Orabug: 28487050] (CVE-2018-3646) (CVE-2018-3646)

  • x86/spec-ctrl: CPUID/MSR definitions for L1D_FLUSH (Andrew Cooper) [Orabug: 28487050] (CVE-2018-3646) (CVE-2018-3646)

  • x86/spec-ctrl: Calculate safe PTE addresses for L1TF mitigations (Andrew Cooper) [Orabug: 28487050] (CVE-2018-3620) (CVE-2018-3646)

  • x86: command line option to avoid use of secondary hyper-threads (Jan Beulich) [Orabug: 28487050] (CVE-2018-3646)

  • cpupools: fix state when downing a CPU failed (Jan Beulich) [Orabug: 28487050] (CVE-2018-3646)

#
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from OracleVM
# Security Advisory OVMSA-2018-0246.
#

include("compat.inc");

if (description)
{
  script_id(111772);
  script_version("1.5");
  script_cvs_date("Date: 2019/09/27 13:00:35");

  script_cve_id("CVE-2018-3620", "CVE-2018-3646");

  script_name(english:"OracleVM 3.4 : xen (OVMSA-2018-0246) (Foreshadow)");
  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=02cec92b3eb1612e37616b10400d82f1e3d8de85

  - BUILDINFO: QEMU upstream
    commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

  - BUILDINFO: QEMU traditional
    commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

  - BUILDINFO: IPXE
    commit=9a93db3f0947484e30e753bbd61a10b17336e20e

  - BUILDINFO: SeaBIOS
    commit=7d9cbe613694924921ed1a6f8947d711c5832eee

  - l1tf: Utility to offline/online SMT siblings. (Ross
    Philipson) [Orabug: 28487050] (CVE-2018-3646)

  - x86/spec-ctrl: Introduce an option to control L1D_FLUSH
    for HVM guests (Andrew Cooper) [Orabug: 28487050]
    (CVE-2018-3620) (CVE-2018-3646)

  - x86/msr: Virtualise MSR_FLUSH_CMD for guests (Andrew
    Cooper) [Orabug: 28487050] (CVE-2018-3646)
    (CVE-2018-3646)

  - x86/spec-ctrl: CPUID/MSR definitions for L1D_FLUSH
    (Andrew Cooper) [Orabug: 28487050] (CVE-2018-3646)
    (CVE-2018-3646)

  - x86/spec-ctrl: Calculate safe PTE addresses for L1TF
    mitigations (Andrew Cooper) [Orabug: 28487050]
    (CVE-2018-3620) (CVE-2018-3646)

  - x86: command line option to avoid use of secondary
    hyper-threads (Jan Beulich) [Orabug: 28487050]
    (CVE-2018-3646)

  - cpupools: fix state when downing a CPU failed (Jan
    Beulich) [Orabug: 28487050] (CVE-2018-3646)"
  );
  # https://oss.oracle.com/pipermail/oraclevm-errata/2018-August/000882.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?d3f57f0d"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected xen / xen-tools packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N");
  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_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:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/16");
  script_set_attribute(attribute:"in_the_news", value:"true");
  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-4.4.4-196", release:"OVS3.4") && rpm_check(release:"OVS3.4", reference:"xen-4.4.4-196.0.2.el6")) flag++;
if (rpm_exists(rpm:"xen-tools-4.4.4-196", release:"OVS3.4") && rpm_check(release:"OVS3.4", reference:"xen-tools-4.4.4-196.0.2.el6")) 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, "xen / xen-tools");
}
VendorProductVersionCPE
oraclevmxenp-cpe:/a:oracle:vm:xen
oraclevmxen-toolsp-cpe:/a:oracle:vm:xen-tools
oraclevm_server3.4cpe:/o:oracle:vm_server:3.4

CVSS2

4.7

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:C/I:N/A:N

CVSS3

5.6

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS

0.002

Percentile

64.5%