Microsoft Office Outlook Denial of Service Vulnerability

# 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.811836");
  script_version("2023-07-25T05:05:58+0000");
  script_cve_id("CVE-2014-2730");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  script_tag(name:"creation_date", value:"2017-09-19 13:12:31 +0530 (Tue, 19 Sep 2017)");
  # nb: Checking for outlook 2007 2010 and 2013, Will Result in FP if its patched already
  script_tag(name:"qod_type", value:"executable_version_unreliable");
  script_name("Microsoft Office Outlook Denial of Service Vulnerability");

  script_tag(name:"summary", value:"Microsoft Office Outlook is prone to a denial of service (DoS) vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The flaw is due to the XML parser in Microsoft
  Office does not properly detect recursion during entity expansion.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  attackers to cause a denial of service (memory consumption and persistent
  application hang) via a crafted XML document.");

  script_tag(name:"affected", value:"- Microsoft Outlook 2007

  - Microsoft Outlook 2010

  - Microsoft Outlook 2013");

  script_tag(name:"solution", value:"A workaround is to add a rule blocking
  XML DTD Entities ('<!ENTITY', case-insensitive) to your spam filter. Creating
  an Outlook rule to permanently delete messages containing '<!ENTITY' also
  mitigates the attack.");

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

  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/archive/1/531722/100/0/threaded");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/78020");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("secpod_office_products_version_900032.nasl");
  script_mandatory_keys("SMB/Office/Outlook/Version");
  exit(0);
}


include("version_func.inc");

outlookVer = get_kb_item("SMB/Office/Outlook/Version");

if(outlookVer && outlookVer =~ "^(12|14|15)\." )
{
  report = report_fixed_ver(installed_version: outlookVer, fixed_version: "Mitigation");
  security_message(data:report);
  exit(0);
}