Citrix XenServer Multiple Security Updates (CTX216071)

# 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("1.3.6.1.4.1.25623.1.0.105895");
  script_cve_id("CVE-2016-7092", "CVE-2016-7093", "CVE-2016-7094", "CVE-2016-7154");
  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_version("2026-04-28T06:28:06+0000");

  script_name("Citrix XenServer Multiple Security Updates (CTX216071)");

  script_xref(name:"URL", value:"http://support.citrix.com/article/CTX216071");

  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 number of security vulnerabilities have been identified in
  Citrix XenServer that may allow malicious privileged code running within a guest VM to compromise the host.");

  script_tag(name:"insight", value:"The following vulnerabilities have been addressed:

  - CVE-2016-7092: x86: Disallow L3 recursive pagetable for 32-bit guests

  - CVE-2016-7093: x86: Mishandling of instruction pointer truncation during emulation

  - CVE-2016-7094: x86 HVM: Overflow of sh_ctxt->seg_reg[]

  - CVE-2016-7154: Use after free in FIFO event channel code");

  script_tag(name:"affected", value:"These vulnerabilities affect 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:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H");
  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:"2016-09-19 13:43:16 +0200 (Mon, 19 Sep 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( "XS70E012" );
patches["6.5.0"] = make_list( "XS65ESP1038" );
patches["6.2.0"] = make_list( "XS62ESP1048" );
patches["6.1.0"] = make_list( "XS61E073" );
patches["6.0.2"] = make_list( "XS602E057", "XS602ECC034" );
patches["6.0.0"] = make_list( "XS60E063" );

citrix_xenserver_check_report_is_vulnerable( version:version, hotfixes:hotfixes, patches:patches );

exit( 99 );