Cisco IOS Software Virtual PPP Interfaces Security Bypass Vulnerability (cisco-sa-20151112-ios1)

# 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:/o:cisco:ios";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105632");
  script_version("2026-02-02T05:59:28+0000");
  script_tag(name:"last_modification", value:"2026-02-02 05:59:28 +0000 (Mon, 02 Feb 2026)");
  script_tag(name:"creation_date", value:"2016-05-03 17:31:06 +0200 (Tue, 03 May 2016)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:P/A:N");

  script_cve_id("CVE-2015-6365");

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

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

  script_name("Cisco IOS Software Virtual PPP Interfaces Security Bypass Vulnerability (cisco-sa-20151112-ios1)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("CISCO");
  script_dependencies("gb_cisco_ios_consolidation.nasl");
  script_mandatory_keys("cisco/ios/detected");

  script_tag(name:"summary", value:"A vulnerability in Cisco devices that are running Cisco IOS
  Software and are configured to use access control lists (ACLs) could allow a user who is
  connected to an authenticated PPP session to bypass ACLs that are configured on virtual PPP
  interfaces, if the ACL on the physical interface permits the traffic to pass.");

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

  script_tag(name:"insight", value:"The vulnerability is due to the physical interface ignoring
  virtual PPP ACLs. An attacker could exploit this vulnerability to bypass virtual PPP ACLs and
  pass denied traffic across virtual PPP interfaces.");

  script_tag(name:"impact", value:"A successful exploit could allow the attacker to pass traffic as
  if the ACLs do not exist.");

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");

  script_xref(name:"URL", value:"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151112-ios1");

  exit(0);
}

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

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

affected = make_list(
  "15.2(4)M",
  "15.4(3)M" );

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 );