Serv-U < 14.0.2.0 FTP Server SSL Renegotiation DoS

2013-07-25T00:00:00
ID SERVU_14_0_2_0.NASL
Type nessus
Reporter This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.
Modified 2021-01-02T00:00:00

Description

According to its banner, the installed version of Serv-U is earlier than 14.0.2.0 and is, therefore, potentially affected by a denial of service vulnerability. A remote attacker could cause denial of service conditions by continually sending SSL renegotiation requests to the application.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(69060);
  script_version("1.3");
  script_cvs_date("Date: 2018/11/15 20:50:22");

  script_bugtraq_id(61139);

  script_name(english:"Serv-U < 14.0.2.0 FTP Server SSL Renegotiation DoS");
  script_summary(english:"Checks Serv-U version");

  script_set_attribute(attribute:"synopsis", value:
"The remote FTP server is affected by a denial of service
vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the installed version of Serv-U is earlier
than 14.0.2.0 and is, therefore, potentially affected by a denial of
service vulnerability.  A remote attacker could cause denial of service
conditions by continually sending SSL renegotiation requests to the
application.");
  script_set_attribute(attribute:"see_also", value:"https://support.solarwinds.com/Success_Center/Serv-U_Managed_File_Transfer_Serv-U_FTP_Server/Serv-U_Documentation/release_notes");
  script_set_attribute(attribute:"solution", value:"Upgrade to Serv-U version 14.0.2.0 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/04/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/04/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/25");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:serv-u:serv-u");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"FTP");

  script_copyright(english:"This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.");

  script_dependencies("servu_version.nasl");
  script_require_keys("ftp/servu");
  script_require_ports("Services/ftp", 21);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("ftp_func.inc");

port    = get_ftp_port(default:21);
version = get_kb_item_or_exit('ftp/'+port+'/servu/version');
source  = get_kb_item_or_exit('ftp/'+port+'/servu/source');

if (ver_compare(ver:version , fix:'14.0.2', strict:FALSE) < 0)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Version source    : '+source+
      '\n  Installed version : '+version +
      '\n  Fixed version     : 14.0.2.0' +
      '\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port);
}
else audit(AUDIT_LISTEN_NOT_VULN, "Serv-U", port, version);