Cisco IOS XE Software Simple Network Management Protocol Subsystem 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

CPE = "cpe:/o:cisco:ios_xe";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106779");
  script_cve_id("CVE-2017-6615");
  script_tag(name:"cvss_base", value:"6.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:N/A:C");
  script_version("2023-07-14T16:09:27+0000");

  script_name("Cisco IOS XE Software Simple Network Management Protocol Subsystem Denial of Service Vulnerability");

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-ios-xe-snmp");

  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 Simple Network Management Protocol (SNMP) subsystem
of Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service (DoS)
condition.");

  script_tag(name:"insight", value:"The vulnerability is due to a race condition that could occur when the
affected software processes an SNMP read request that contains certain criteria for a specific object ID (OID)
and an active crypto session is disconnected on an affected device. An attacker who can authenticate to an
affected device could trigger this vulnerability by issuing an SNMP request for a specific OID on the device.");

  script_tag(name:"impact", value:"A successful exploit will cause the device to restart due to an attempt to
access an invalid memory region. The attacker does not control how or when crypto sessions are disconnected on
the device.");

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

  script_tag(name:"last_modification", value:"2023-07-14 16:09:27 +0000 (Fri, 14 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/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_tag(name:"creation_date", value:"2017-04-20 16:12:29 +0200 (Thu, 20 Apr 2017)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_dependencies("gb_cisco_ios_xe_consolidation.nasl");
  script_mandatory_keys("cisco/ios_xe/detected");

  exit(0);
}

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

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

affected = make_list(
  '3.16.0S',
  '3.16.0c.S',
  '3.16.1S',
  '3.16.1a.S',
  '3.16.2S');

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);