Citrix XenServer Multiple Security Updates (CTX225941)

# 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("1.3.6.1.4.1.25623.1.0.140303");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2017-08-16 09:04:44 +0700 (Wed, 16 Aug 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:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");

  script_cve_id("CVE-2017-12134", "CVE-2017-12135", "CVE-2017-12136", "CVE-2017-12137", "CVE-2017-12855");

  script_tag(name:"qod_type", value:"package");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Citrix XenServer Multiple Security Updates (CTX225941)");

  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-2017-12134: linux: Fix Xen block IO merge-ability calculation.

  - CVE-2017-12135: Multiple problems with transitive grants.

  - CVE-2017-12136: grant_table: Race conditions with maptrack free list handling.

  - CVE-2017-12137: x86: PV privilege escalation via map_grant_ref.

  - CVE-2017-12855: grant_table: Possibly premature clearing of GTF_writing / GTF_reading.");

  script_tag(name:"vuldetect", value:"Check the installed hotfixes.");

  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_xref(name:"URL", value:"https://support.citrix.com/article/CTX225941");

  exit(0);
}

include("citrix_version_func.inc");
include("list_array_func.inc");
include("host_details.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("XS72E004", "XS72E005");
patches["7.1.0"] = make_list("XS71E013", "XS71E014");
patches["7.0.0"] = make_list("XS70E039", "XS70E040");
patches["6.5.0"] = make_list("XS65ESP1059", "XS65ESP1060");
patches["6.2.0"] = make_list("XS62ESP1063");
patches["6.0.2"] = make_list("XS602ECC047");

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

exit(99);