Kannel Privilege Escalation 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:/a:kannel:kannel";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140386");
  script_version("2025-09-05T15:40:40+0000");
  script_tag(name:"last_modification", value:"2025-09-05 15:40:40 +0000 (Fri, 05 Sep 2025)");
  script_tag(name:"creation_date", value:"2017-09-21 15:08:29 +0700 (Thu, 21 Sep 2017)");
  script_tag(name:"cvss_base", value:"4.6");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/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-2017-14609");

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

  script_name("Kannel Privilege Escalation Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Privilege escalation");
  script_dependencies("gb_kannel_detect.nasl");
  script_mandatory_keys("kannel/installed");

  script_tag(name:"summary", value:"Kannel is prone to a privilege escalation vulnerability.");

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

  script_tag(name:"insight", value:"The server daemons create a PID file after dropping privileges to a
non-root account, which might allow local users to kill arbitrary processes by leveraging access to this
non-root account for PID file modification before a root script executes a 'kill `cat /pathname`' command, as
demonstrated by bearerbox.");

  script_tag(name:"affected", value:"Kannel version 1.5.0 and prior.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.");
  script_tag(name:"solution_type", value:"WillNotFix");
  script_xref(name:"URL", value:"https://redmine.kannel.org/issues/771");

  exit(0);
}

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

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

if (version =~ "^svn") {
  if (version_is_less_equal(version: version, test_version: "svn-r5179")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "None");
    security_message(port: 0, data: report);
    exit(0);
  }
}
else {
  if (version_is_less_equal(version: version, test_version: "1.5.0")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "None");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(0);