SlimFTPd Multiple Command Handling Overflow - Nessus

High   Plugin ID: 15704

This page contains detailed information about the SlimFTPd Multiple Command Handling Overflow Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents
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Plugin Overview

ID: 15704
Name: SlimFTPd Multiple Command Handling Overflow
Filename: slimftpd_overflow.nasl
Vulnerability Published: 2004-11-10
This Plugin Published: 2004-11-13
Last Modification Time: 2018-11-15
Plugin Version: 1.17
Plugin Type: remote
Plugin Family: FTP
Dependencies: ftpserver_detect_type_nd_version.nasl

Vulnerability Information

Severity: High
Vulnerability Published: 2004-11-10
Patch Published: N/A
CVE [?]: CVE-2004-2418, CVE-2005-2373
CPE [?]: N/A

Synopsis

The remote FTP server is prone to multiple buffer overflow attacks.

Description

The remote host appears to be using SlimFTPd, a free, small, standards-compliant FTP server for Windows.

According to its banner, the version of SlimFTPd installed on the remote host is prone to one or more buffer overflow attacks that can lead to arbitrary code execution.

Note that successful exploitation of either of these flaws requires an attacker first authenticate.

Solution

Upgrade to SlimFTPd version 3.17 or later.

Public Exploits

Target Network Port(s): 21
Target Asset(s): Services/ftp
Exploit Available: True (Metasploit Framework, Exploit-DB, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the SlimFTPd Multiple Command Handling Overflow vulnerability:

  1. Metasploit: exploit/windows/ftp/slimftpd_list_concat
    [SlimFTPd LIST Concatenation Overflow]
  2. Exploit-DB: exploits/windows/remote/16729.rb
    [EDB-16729: SlimFTPd - 'LIST' Concatenation Overflow (Metasploit)]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:F/RL:OF/RC:C
CVSS Base Score:9.0 (High)
Impact Subscore:10.0
Exploitability Subscore:8.0
CVSS Temporal Score:7.4 (High)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:7.4 (High)

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Plugin Source

This is the slimftpd_overflow.nasl nessus plugin source code. This script is Copyright (C) 2004-2018 Tenable Network Security, Inc. 

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

include("compat.inc");

if(description)
{
 script_id(15704);
 script_version("1.17");
 script_cvs_date("Date: 2018/11/15 20:50:22");

 script_cve_id("CVE-2004-2418", "CVE-2005-2373");
 script_bugtraq_id(11645, 14339);
 
 script_name(english:"SlimFTPd Multiple Command Handling Overflow");
 script_summary(english:"Checks version in the banner");
 
 script_set_attribute(
  attribute:"synopsis",
  value:"The remote FTP server is prone to multiple buffer overflow attacks."
 );
 script_set_attribute(
  attribute:"description", 
  value: 
"The remote host appears to be using SlimFTPd, a free, small,
standards-compliant FTP server for Windows. 

According to its banner, the version of SlimFTPd installed on the
remote host is prone to one or more buffer overflow attacks that can
lead to arbitrary code execution. 

Note that successful exploitation of either of these flaws requires an
attacker first authenticate."
 );
 script_set_attribute(
  attribute:"see_also", 
  value:"https://seclists.org/fulldisclosure/2004/Nov/333"
 );
 script_set_attribute(
  attribute:"see_also", 
  value:"https://seclists.org/bugtraq/2005/Jul/346"
 );
 script_set_attribute(
  attribute:"solution", 
  value:"Upgrade to SlimFTPd version 3.17 or later."
 );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
 script_set_attribute(attribute:"metasploit_name", value:'SlimFTPd LIST Concatenation Overflow');
 script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
 script_set_attribute(attribute:"plugin_publication_date", value: "2004/11/13");
 script_set_attribute(attribute:"vuln_publication_date", value: "2004/11/10");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_end_attributes();
 
 script_category(ACT_GATHER_INFO);
 
 script_copyright(english:"This script is Copyright (C) 2004-2018 Tenable Network Security, Inc.");
 script_family(english:"FTP");
 script_dependencie("ftpserver_detect_type_nd_version.nasl");
 script_require_ports("Services/ftp", 21);
 exit(0);
}


include("ftp_func.inc");


port = get_ftp_port(default: 21);

banner = get_ftp_banner(port:port);
if ( ! banner ) exit(1);


# There's a problem if...
if (
  # The version in the banner is <= 3.16 or...
  egrep(string:banner, pattern:"^220-SlimFTPd ([0-2]\.|3\.1[0-6][^0-9])")
) {
  security_hole(port);
}

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/slimftpd_overflow.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\slimftpd_overflow.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/slimftpd_overflow.nasl

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How to Run

Here is how to run the SlimFTPd Multiple Command Handling Overflow as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select FTP plugin family.
  6. On the right side table select SlimFTPd Multiple Command Handling Overflow plugin ID 15704.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl slimftpd_overflow.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a slimftpd_overflow.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - slimftpd_overflow.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state slimftpd_overflow.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID: See also: Similar and related Nessus plugins:
  • 14195 - 4D WebStar Pre-authentication FTP Overflow
  • 15628 - Ability FTP Server Multiple Command Remote Buffer Overflows
  • 11205 - WarFTPd CWD/MKD Command Overflow
  • 11207 - WarFTPd USER/PASS Command Remote Overflow
  • 24021 - Easy File Sharing FTP Server PASS Command Overflow
  • 10084 - Multiple FTP Server Command Handling Overflow
  • 12080 - Serv-U MDTM Command Overflow
  • 18627 - GlobalSCAPE Secure FTP Server User Input Overflow
  • 18402 - Hummingbird InetD FTP Component (ftpdw.exe) Command Overflow
  • 40825 - MS09-053: Microsoft IIS FTPd NLST Command Remote Buffer Overflow (975191) (uncredentialed check)
  • 18142 - Intersoft NetTerm Netftpd USER Command Remote Overflow
  • 17718 - ProFTPD < 1.3.1rc1 mod_ctrls Module pr_ctrls_recv_request Function Local Overflow
  • 51366 - ProFTPD < 1.3.3d 'mod_sql' Buffer Overflow
  • 70446 - ProFTPD TELNET IAC Escape Sequence Remote Buffer Overflow
  • 15857 - WS_FTP Server Multiple Command Remote Overflow DoS

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file slimftpd_overflow.nasl version 1.17. For more plugins, visit the Nessus Plugin Library.

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