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
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.1 High
AI Score
Confidence
Low
0.001 Low
EPSS
Percentile
42.3%
A number of security vulnerabilities have been identified in Citrix
XenServer that may allow a malicious administrator of a guest VM to compromise the host.
# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
CPE = "cpe:/a:citrix:xenserver";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.140421");
script_version("2023-07-14T16:09:27+0000");
script_tag(name:"last_modification", value:"2023-07-14 16:09:27 +0000 (Fri, 14 Jul 2023)");
script_tag(name:"creation_date", value:"2017-10-16 09:49:18 +0700 (Mon, 16 Oct 2017)");
script_tag(name:"cvss_base", value:"7.2");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2018-10-30 10:29:00 +0000 (Tue, 30 Oct 2018)");
script_cve_id("CVE-2017-15595", "CVE-2017-15588", "CVE-2017-15593", "CVE-2017-15592", "CVE-2017-15594",
"CVE-2017-15590", "CVE-2017-15589");
script_tag(name:"qod_type", value:"package");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Citrix XenServer Multiple Security Updates (CTX228867)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2017 Greenbone AG");
script_family("Citrix Xenserver Local Security Checks");
script_dependencies("gb_xenserver_version.nasl");
script_mandatory_keys("xenserver/product_version", "xenserver/patches");
script_tag(name:"summary", value:"A number of security vulnerabilities have been identified in Citrix
XenServer that may allow a malicious administrator of a guest VM to compromise the host.");
script_tag(name:"insight", value:"The following vulnerabilities have been addressed:
- CVE-2017-15595: Unlimited recursion in linear pagetable de-typing
- CVE-2017-15588: Stale TLB entry due to page type release race
- CVE-2017-15593: page type reference leak on x86
- CVE-2017-15592: x86: Incorrect handling of self-linear shadow mappings with translated guests
- CVE-2017-15594: x86: Incorrect handling of IST settings during CPU hotplug
- CVE-2017-15590: multiple MSI mapping issues on x86
- CVE-2017-15589: hypervisor stack leak in x86 I/O intercept code
For customers that do not have PV-based guests, are not using PCI passthrough and are using hardware with HAP
support, the risk is reduced to a disclosure of a small part of the hypervisor stack.");
script_tag(name:"affected", value:"XenServer versions 7.2, 7.1, 7.0, 6.5, 6.2.0, 6.0.2.");
script_tag(name:"solution", value:"Apply the hotfix referenced in the advisory.");
script_tag(name:"vuldetect", value:"Check the installed hotfixes.");
script_xref(name:"URL", value:"https://support.citrix.com/article/CTX228867");
exit(0);
}
include("citrix_version_func.inc");
include("list_array_func.inc");
include("host_details.inc");
include("misc_func.inc");
if (!version = get_app_version(cpe: CPE))
exit(0);
if (!hotfixes = get_kb_item("xenserver/patches"))
exit(0);
patches = make_array();
patches['7.2.0'] = make_list('XS72E008');
patches['7.1.0'] = make_list('XS71E016');
patches['7.0.0'] = make_list('XS70E046');
patches['6.5.0'] = make_list('XS65ESP1062');
patches['6.2.0'] = make_list('XS62ESP1065');
patches['6.0.2'] = make_list('XS602ECC049');
citrix_xenserver_check_report_is_vulnerable(version: version, hotfixes: hotfixes, patches: patches);
exit(99);
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
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.1 High
AI Score
Confidence
Low
0.001 Low
EPSS
Percentile
42.3%