Core FTP < 2.2 build 1785 CWD Command Buffer Overflow

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

include("compat.inc");

if (description)
{
  script_id(70656);
  script_version("1.3");
  script_cvs_date("Date: 2018/07/06 11:26:08");

  script_cve_id("CVE-2013-3930");
  script_bugtraq_id(61786);

  script_name(english:"Core FTP < 2.2 build 1785 CWD Command Buffer Overflow");
  script_summary(english:"Checks version of Core FTP");

  script_set_attribute(
    attribute:"synopsis",
    value:
"An FTP client on the remote host is affected by a stack-based buffer
overflow vulnerability."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The version of Core FTP installed on the remote host is prior to 2.2
build 1785.  It is, therefore, affected by a stack-based buffer overflow
vulnerability because user-supplied input is not properly validated when
handling directory names via the 'CWD' command.  A remote attacker could
potentially exploit this issue with specially crafted directory names,
resulting in a denial of service or code execution subject to the user's
privileges."
  );
  script_set_attribute(attribute:"see_also", value:"http://coreftp.com/forums/viewtopic.php?t=222102");
  script_set_attribute(attribute:"solution", value:"Upgrade to Core FTP 2.2 build 1785 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  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:"2013/08/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/08/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/10/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:coreftp:coreftp");
  script_end_attributes();

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

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

  script_dependencies("coreftp_stack_overflow.nasl");
  script_require_keys("SMB/CoreFTP/Installed");
  exit(0);
}

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

appname = 'Core FTP';
kb_base = "SMB/CoreFTP/";

path = get_kb_item_or_exit(kb_base + "Path");
version = get_kb_item_or_exit(kb_base + "Version");

fix = "2.2.1785.0";

if (ver_compare(ver:version, fix:fix, strict:FALSE) == -1)
{
  port = get_kb_item("SMB/transport");
  if (!port) port = 445;

  if (report_verbosity > 0)
  {
    report = '\n  File              : ' + path + "\coreftp.exe" +
             '\n  Installed version : ' + version +
             '\n  Fixed version     : ' + fix + '\n';
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
  exit(0);
}
else audit(AUDIT_INST_PATH_NOT_VULN, appname, version, path);