Cisco Email Security Appliance Corrupted Attachment Fields Denial of Service Vulnerability

# 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:/h:cisco:email_security_appliance";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140027");
  script_cve_id("CVE-2016-6356");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_version("2025-12-19T15:41:09+0000");

  script_name("Cisco Email Security Appliance Corrupted Attachment Fields Denial of Service Vulnerability");

  script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161026-esa3");

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

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");
  script_tag(name:"summary", value:"A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email
  Security Appliances could allow an unauthenticated, remote attacker to cause an affected device to
  stop scanning and forwarding email messages due to a denial of service (DoS) condition.

  The vulnerability is due to improper input validation of email attachments that have corrupted
  fields. An attacker could exploit this vulnerability by sending a crafted email message, which has
  an attachment with corrupted fields, through an affected device. When the affected software filters
  the attachment, the filtering process could crash and restart, resulting in a DoS condition. After
  the filtering process restarts, the software resumes filtering for the same attachment, causing the
  filtering process to crash and restart again. A successful exploit could allow the attacker to cause
  a repeated DoS condition.

  Cisco has released software updates that address this vulnerability. There are no workarounds that
  address this vulnerability.");

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

  script_tag(name:"last_modification", value:"2025-12-19 15:41:09 +0000 (Fri, 19 Dec 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-07-29 01:34:00 +0000 (Sat, 29 Jul 2017)");
  script_tag(name:"creation_date", value:"2016-10-27 14:11:57 +0200 (Thu, 27 Oct 2016)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_dependencies("gb_cisco_esa_consolidation.nasl");
  script_mandatory_keys("cisco/esa/detected");
  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if( ! version = get_app_version( cpe:CPE ) ) exit( 0 );

affected = make_list(
  '3.3.1-09',
  '7.1.0',
  '7.1.1',
  '7.1.2',
  '7.1.3',
  '7.1.4',
  '7.1.5',
  '7.3.0',
  '7.3.1',
  '7.3.2',
  '7.5.0',
  '7.5.1',
  '7.5.2',
  '7.5.2-201',
  '7.6.0',
  '7.6.1-000',
  '7.6.1-gpl-022',
  '7.6.2',
  '7.6.3-000',
  '7.6.3-025',
  '7.7.0-000',
  '7.7.1-000',
  '7.8.0',
  '7.8.0-311',
  '8.0.0',
  '8.0.1-023',
  '8.5.0-000',
  '8.5.0-ER1-198',
  '8.5.6-052',
  '8.5.6-073',
  '8.5.6-074',
  '8.5.6-106',
  '8.5.6-113',
  '8.5.7-042',
  '8.6.0',
  '8.6.0-011',
  '8.9.0',
  '8.9.1-000',
  '8.9.2-032',
  '9.0.0',
  '9.0.0-212',
  '9.0.0-461',
  '9.0.5-000',
  '9.1.0',
  '9.1.0-011',
  '9.1.0-101',
  '9.1.0-032',
  '9.4.0',
  '9.4.4-000',
  '9.5.0-000',
  '9.5.0-201',
  '9.6.0-000',
  '9.6.0-042',
  '9.6.0-051',
  '9.7.0-125',
  '9.7.1-066' );

foreach af ( affected )
{
  if( version == af )
  {
    report = report_fixed_ver(  installed_version:version, fixed_version: "See advisory" );
    security_message( port:0, data:report );
    exit( 0 );
  }
}

exit( 99 );