Vulnerabilities > CVE-2013-3930 - Buffer Errors vulnerability in Coreftp Core FTP 1.2/2.1/2.2

047910
CVSS 9.3 - CRITICAL
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
coreftp
CWE-119
critical
nessus
NVD
Published: 2014-04-04
Updated: 2014-08-11

Summary

Stack-based buffer overflow in Core FTP before 2.2 build 1785 allows remote FTP servers to execute arbitrary code via a crafted directory name in a CWD command reply.

Vulnerable Configurations

Part Description Count
Application
Coreftp
4

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familyWindows
NASL idCOREFTP_2_2_1785.NASL
descriptionThe 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
last seen2020-06-01
modified2020-06-02
plugin id70656
published2013-10-28
reporterThis script is Copyright (C) 2013-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/70656
titleCore FTP < 2.2 build 1785 CWD Command Buffer Overflow
code
#
# (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);

References