7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
31.1%
The remote OracleVM system is missing necessary patches to address critical security updates :
BUILDINFO:
commit=a83239e012959a65503ebb44ee9c54620a9d78f5
evtchn-fifo: prevent use after free (Boris Ostrovsky) (CVE-2016-7154)
x86/segment: Bounds check accesses to emulation ctxt->seg_reg[] (Andrew Cooper) (CVE-2016-7094)
x86/shadow: Avoid overflowing sh_ctxt->seg_reg[] (Andrew Cooper) (CVE-2016-7094)
x86/32on64: don’t allow recursive page tables from L3 (Jan Beulich) (CVE-2016-7092)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from OracleVM
# Security Advisory OVMSA-2016-0102.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(93395);
script_version("2.17");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2016-7092", "CVE-2016-7094", "CVE-2016-7154");
script_name(english:"OracleVM 3.4 : xen (OVMSA-2016-0102)");
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:
commit=a83239e012959a65503ebb44ee9c54620a9d78f5
- evtchn-fifo: prevent use after free (Boris Ostrovsky)
(CVE-2016-7154)
- x86/segment: Bounds check accesses to emulation
ctxt->seg_reg[] (Andrew Cooper) (CVE-2016-7094)
- x86/shadow: Avoid overflowing sh_ctxt->seg_reg[] (Andrew
Cooper) (CVE-2016-7094)
- x86/32on64: don't allow recursive page tables from L3
(Jan Beulich) (CVE-2016-7092)"
);
# https://oss.oracle.com/pipermail/oraclevm-errata/2016-September/000517.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?c948f06e"
);
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:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
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:"2016/09/21");
script_set_attribute(attribute:"patch_publication_date", value:"2016/09/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/09/09");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2021 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-4.4.4-75", release:"OVS3.4") && rpm_check(release:"OVS3.4", reference:"xen-4.4.4-75.0.2.el6")) flag++;
if (rpm_exists(rpm:"xen-tools-4.4.4-75", release:"OVS3.4") && rpm_check(release:"OVS3.4", reference:"xen-tools-4.4.4-75.0.2.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");
}
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
31.1%