3.3 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:P/A:N
6.3 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
7.5 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
31.4%
A security vulnerability has been identified in
Citrix XenServer that may allow malicious user code within an HVM guest VM to read
or modify the contents of certain registers belonging to other tasks within that same guest VM.
# SPDX-FileCopyrightText: 2016 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("1.3.6.1.4.1.25623.1.0.140014");
script_cve_id("CVE-2016-7777");
script_tag(name:"cvss_base", value:"3.3");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:P/I:P/A:N");
script_version("2023-07-20T05:05:17+0000");
script_name("Citrix XenServer Security Update for CVE-2016-7777 (CTX217363)");
script_xref(name:"URL", value:"http://support.citrix.com/article/CTX217363");
script_tag(name:"vuldetect", value:"Check the installed hotfixes.");
script_tag(name:"solution", value:"Apply the hotfix referenced in the advisory.");
script_tag(name:"summary", value:"A security vulnerability has been identified in
Citrix XenServer that may allow malicious user code within an HVM guest VM to read
or modify the contents of certain registers belonging to other tasks within that same guest VM.");
script_tag(name:"affected", value:"This vulnerability affects all currently supported
versions of Citrix XenServer up to and including Citrix XenServer 7.0.");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"package");
script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2017-07-01 01:30:00 +0000 (Sat, 01 Jul 2017)");
script_tag(name:"creation_date", value:"2016-10-25 10:24:27 +0200 (Tue, 25 Oct 2016)");
script_category(ACT_GATHER_INFO);
script_family("Citrix Xenserver Local Security Checks");
script_copyright("Copyright (C) 2016 Greenbone AG");
script_dependencies("gb_xenserver_version.nasl");
script_mandatory_keys("xenserver/product_version", "xenserver/patches");
exit(0);
}
include("citrix_version_func.inc");
include("host_details.inc");
include("list_array_func.inc");
if( ! version = get_app_version( cpe:CPE ) )
exit( 0 );
if( ! hotfixes = get_kb_item("xenserver/patches") )
exit( 0 );
patches = make_array();
patches['7.0.0'] = make_list( 'XS70E014' );
patches['6.5.0'] = make_list( 'XS65ESP1039' );
patches['6.2.0'] = make_list( 'XS62ESP1050' );
patches['6.0.2'] = make_list( 'XS602ECC035' );
citrix_xenserver_check_report_is_vulnerable( version:version, hotfixes:hotfixes, patches:patches );
exit( 99 );
3.3 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:P/A:N
6.3 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
7.5 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
31.4%