ProFTPD < 1.3.6b, 1.3.7rc < 1.3.7rc2 DoS Vulnerability

# SPDX-FileCopyrightText: 2019 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:proftpd:proftpd";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.107734");
  script_version("2026-05-05T06:23:58+0000");
  script_tag(name:"last_modification", value:"2026-05-05 06:23:58 +0000 (Tue, 05 May 2026)");
  script_tag(name:"creation_date", value:"2019-10-23 11:13:50 +0200 (Wed, 23 Oct 2019)");
  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:"severity_vector", value:"CVSS:3.1/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:"2019-10-27 21:15:00 +0000 (Sun, 27 Oct 2019)");

  script_cve_id("CVE-2019-18217");

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

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

  script_name("ProFTPD < 1.3.6b, 1.3.7rc < 1.3.7rc2 DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_proftpd_consolidation.nasl");
  script_mandatory_keys("proftpd/detected");

  script_tag(name:"summary", value:"ProFTPD is prone to a unauthenticated 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:"ProFTPD allows remote unauthenticated denial-of-service due to
  incorrect handling of overly long commands because main.c in a child process enters an infinite
  loop.");

  script_tag(name:"affected", value:"ProFTPD prior to version 1.3.6b and 1.3.7rc prior to
  1.3.7rc2.");

  script_tag(name:"solution", value:"Update to version 1.3.6b, 1.3.7rc2 or later.");

  script_xref(name:"URL", value:"https://github.com/proftpd/proftpd/issues/846");
  script_xref(name:"URL", value:"https://github.com/proftpd/proftpd/blob/1.3.6/RELEASE_NOTES");
  script_xref(name:"URL", value:"https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES");

  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");
include("version_func.inc");

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

if (revcomp(a: version, b: "1.3.6b") < 0) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.3.6b");
  security_message(port: 0, data: report);
  exit(0);
}

else if (version =~ "^1\.3\.7rc1") {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.3.7rc2");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);