ProFTPD < 1.3.3c Multiple Vulnerabilities - Nessus

Critical Plugin ID: 50544

This page contains detailed information about the ProFTPD < 1.3.3c Multiple Vulnerabilities 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
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 50544
Name: ProFTPD < 1.3.3c Multiple Vulnerabilities
Filename: proftpd_1_3_3c.nasl
Vulnerability Published: 2010-11-01
This Plugin Published: 2010-11-10
Last Modification Time: 2020-03-27
Plugin Version: 1.19
Plugin Type: remote
Plugin Family: FTP
Dependencies: ftpserver_detect_type_nd_version.nasl
Required KB Items [?]: ftp/proftpd, Settings/ParanoidReport

Vulnerability Information

Severity: Critical
Vulnerability Published: 2010-11-01
Patch Published: 2010-10-29
CVE [?]: CVE-2010-3867, CVE-2010-4221
CPE [?]: cpe:/a:proftpd:proftpd

Synopsis

The remote FTP server is affected by multiple vulnerabilities.

Description

The remote host is using ProFTPD, a free FTP server for Unix and Linux.

According to its banner, the version of ProFTPD installed on the remote host is earlier than 1.3.3c. Such versions are reportedly affected by the following vulnerabilities :

- When ProFTPD is compiled with 'mod_site_misc' and a directory is writable, a user can use 'mod_site_misc' to create or delete a directory outside the writable directory, create a symlink located outside the writable directory, or change the time of a file located outside the writable directory. (Bug #3519)

- A stack-based buffer overflow exists in the server's 'pr_netio_telnet_gets()' function, which can be triggered by when reading user input containing a TELNET_IAC escape sequence. (Bug #3521)

Note that Nessus did not actually test for the flaws but instead has relied on the version in ProFTPD's banner so this may be a false positive.

Solution

Upgrade to ProFTPD version 1.3.3c or later.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the ProFTPD < 1.3.3c Multiple Vulnerabilities vulnerability:

Metasploit: exploit/linux/ftp/proftp_telnet_iac
[ProFTPD 1.3.2rc3 - 1.3.3b Telnet IAC Buffer Overflow (Linux)]
Metasploit: exploit/freebsd/ftp/proftp_telnet_iac
[ProFTPD 1.3.2rc3 - 1.3.3b Telnet IAC Buffer Overflow (FreeBSD)]
Exploit-DB: exploits/linux/remote/15449.pl
[EDB-15449: ProFTPd IAC 1.3.x - Remote Command Execution]
Exploit-DB: exploits/linux/remote/16851.rb
[EDB-16851: ProFTPd 1.3.2 rc3 < 1.3.3b (Linux) - Telnet IAC Buffer Overflow (Metasploit)]
Exploit-DB: exploits/linux/remote/16878.rb
[EDB-16878: ProFTPd 1.3.2 rc3 < 1.3.3b (FreeBSD) - Telnet IAC Buffer Overflow (Metasploit)]
GitHub: https://github.com/tpez0/node-nmap-vulners
[CVE-2010-3867]
GitHub: https://github.com/5l1v3r1/0rion-Framework
[CVE-2010-4221]
GitHub: https://github.com/M31MOTH/cve-2010-4221
[CVE-2010-4221: This exploit was written to study some concepts, enjoy!]
GitHub: https://github.com/ankh2054/python-exploits
[CVE-2010-4221]
GitHub: https://github.com/mudongliang/LinuxFlaw/tree/master/CVE-2010-4221
[CVE-2010-4221]
GitHub: https://github.com/vasanth-tamil/ctf-writeups
[CVE-2010-4221]

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 Score Source [?]: CVE-2010-4221
CVSS V2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:F/RL:OF/RC:C

CVSS Base Score:	10.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	10.0
CVSS Temporal Score:	8.3 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.3 (High)

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Plugin Source

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

include("compat.inc");

if (description)
{
  script_id(50544);
  script_version("1.19");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/27");

  script_cve_id("CVE-2010-3867", "CVE-2010-4221");
  script_bugtraq_id(44562);
  script_xref(name:"EDB-ID", value:"15449");
  script_xref(name:"Secunia", value:"42052");

  script_name(english:"ProFTPD < 1.3.3c Multiple Vulnerabilities");
  script_summary(english:"Checks version in the service banner");

  script_set_attribute(attribute:"synopsis", value:"The remote FTP server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host is using ProFTPD, a free FTP server for Unix and
Linux.

According to its banner, the version of ProFTPD installed on the
remote host is earlier than 1.3.3c. Such versions are reportedly
affected by the following vulnerabilities :

  - When ProFTPD is compiled with 'mod_site_misc' and a
    directory is writable, a user can use 'mod_site_misc'
    to create or delete a directory outside the writable
    directory, create a symlink located outside the
    writable directory, or change the time of a file
    located outside the writable directory. (Bug #3519)

  - A stack-based buffer overflow exists in the server's
    'pr_netio_telnet_gets()' function, which can be
    triggered by when reading user input containing a
    TELNET_IAC escape sequence. (Bug #3521)

Note that Nessus did not actually test for the flaws but instead has
relied on the version in ProFTPD's banner so this may be a false
positive.");
  script_set_attribute(attribute:"see_also", value:"http://www.zerodayinitiative.com/advisories/ZDI-10-229/");
  script_set_attribute(attribute:"see_also", value:"http://bugs.proftpd.org/show_bug.cgi?id=3519");
  script_set_attribute(attribute:"see_also", value:"http://bugs.proftpd.org/show_bug.cgi?id=3521");
  # https://web.archive.org/web/20160117095522/http://www.proftpd.org/docs/RELEASE_NOTES-1.3.3c
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c2cebd53");
  script_set_attribute(attribute:"solution", value:"Upgrade to ProFTPD version 1.3.3c or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2010-4221");
  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:'ProFTPD 1.3.2rc3 - 1.3.3b Telnet IAC Buffer Overflow (Linux)');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2010/11/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/10/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/11/10");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:proftpd:proftpd");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"FTP");
  script_copyright(english:"This script is Copyright (C) 2010-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ftpserver_detect_type_nd_version.nasl");
  script_require_keys("ftp/proftpd", "Settings/ParanoidReport");
  script_require_ports("Services/ftp", 21);

  exit(0);
}


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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = get_ftp_port(default: 21, broken:TRUE);

banner = get_ftp_banner(port:port);
if (!banner) exit(1, "Unable to obtain FTP banner on port "+port+".");
if ("ProFTPD" >!< banner) exit(1, "The FTP service on port "+port+" does not appear to be ProFTPD.");

matches = pregmatch(string:banner, pattern:"ProFTPD ([0-9a-z.]+) ");
if (!isnull(matches)) version = matches[1];
else exit(1, "Unable to obtain version number from FTP banner on port "+port+".");

if (
  version =~ "^0\." ||
  version =~ "^1\.[0-2]\." ||
  version =~ "^1\.3\.[0-2]($|\.|[^0-9])" ||
  version =~ "^1\.3\.3($|[ab]$|rc[0-9]+$)"
)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Version source    : ' + chomp(banner) +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : 1.3.3c\n';
    security_hole(port:port, extra:report);
    exit(0);
  }
  else security_hole(port);
  exit(0);
}
else exit(0, "The ProFTPD server on port "+port+" is not affected.");

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/proftpd_1_3_3c.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\proftpd_1_3_3c.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/proftpd_1_3_3c.nasl

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How to Run

Here is how to run the ProFTPD < 1.3.3c Multiple Vulnerabilities as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select FTP plugin family.
On the right side table select ProFTPD < 1.3.3c Multiple Vulnerabilities plugin ID 50544.
Specify the target on the Settings tab and click to Save the scan.
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 proftpd_1_3_3c.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a proftpd_1_3_3c.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - proftpd_1_3_3c.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 proftpd_1_3_3c.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

44562

Secunia Advisory:

42052

See also:

Similar and related Nessus plugins:

52660 - Debian DSA-2191-1 : proftpd-dfsg - several vulnerabilities
50551 - Fedora 14 : proftpd-1.3.3c-1.fc14 (2010-17091)
50553 - Fedora 13 : proftpd-1.3.3c-1.fc13 (2010-17098)
50568 - Fedora 12 : proftpd-1.3.3c-1.fc12 (2010-17220)
50700 - FreeBSD : proftpd -- remote code execution vulnerability (533d20e7-f71f-11df-9ae1-000bcdf0a03b)
70111 - GLSA-201309-15 : ProFTPD: Multiple vulnerabilities
50571 - Mandriva Linux Security Advisory : proftpd (MDVSA-2010:227)
70446 - ProFTPD TELNET IAC Escape Sequence Remote Buffer Overflow
50436 - Slackware 11.0 / 12.0 / 12.1 / 12.2 / 13.0 / 13.1 / current : proftpd (SSA:2010-305-03)
27055 - ProFTPD < 1.3.0a Multiple Vulnerabilities
17718 - ProFTPD < 1.3.1rc1 mod_ctrls Module pr_ctrls_recv_request Function Local Overflow
106750 - ProFTPD 1.3.1 SQL injection protection bypass
50989 - ProFTPD Compromised Source Packages Trojaned Distribution
51366 - ProFTPD < 1.3.3d 'mod_sql' Buffer Overflow
56956 - ProFTPD < 1.3.3g / 1.3.4 Response Pool Use-After-Free Code Execution
84215 - ProFTPD mod_copy Information Disclosure
106754 - ProFTPD 1.3.4d / 1.3.5rc3 Denial of Service
106755 - ProFTPD < 1.3.5b / 1.3.6x < 1.3.6rc2 weak Diffie-Hellman key
106756 - ProFTPD < 1.3.5e / 1.3.6x < 1.3.6rc5 AllowChrootSymlinks bypass
77986 - GNU Bash Environment Variable Handling Code Injection via ProFTPD (Shellshock)
34265 - ProFTPD Command Truncation Cross-Site Request Forgery
132749 - ProFTPD 'mod_copy' Arbitrary File Copy Vulnerability (Remote)
35690 - ProFTPD Username Variable Substitution SQL Injection

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file proftpd_1_3_3c.nasl version 1.19. For more plugins, visit the Nessus Plugin Library.

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ProFTPD < 1.3.3c Multiple Vulnerabilities - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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