Vulnerabilities > CVE-2012-4992 - Buffer Errors vulnerability in Flashfxp 4.2

047910
CVSS 9.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
flashfxp
CWE-119
critical
nessus
exploit available
NVD
Published: 2012-09-19
Updated: 2017-08-29

Summary

Multiple buffer overflows in FlashFXP.exe in FlashFXP 4.2 allow remote authenticated users to execute arbitrary code via a long unicode string to (1) TListbox or (2) TComboBox.

Vulnerable Configurations

Part Description Count
Application
Flashfxp
1

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.

Exploit-Db

descriptionFlashFXP 4.1.8.1701 - Buffer Overflow Vulnerability. CVE-2012-4992. Remote exploit for windows platform
fileexploits/windows/remote/18555.txt
idEDB-ID:18555
last seen2016-02-02
modified2012-03-03
platformwindows
port
published2012-03-03
reporterVulnerability-Lab
sourcehttps://www.exploit-db.com/download/18555/
titleFlashFXP 4.1.8.1701 - Buffer Overflow Vulnerability
typeremote

Nessus

NASL familyWindows
NASL idFLASHFXP_4_2_0_1730.NASL
descriptionThe remote host is running a version of FlashFXP prior to 4.2.0.1730. It therefore is reportedly has a buffer overflow vulnerability involving the TListbox and TComboBox VCL components. To exploit the vulnerability remotely, an attacker would need to know the included filters of the connected client to send large strings. Successful exploitation would allow an attacker to execute arbitrary code within the context of the affected application.
last seen2020-06-01
modified2020-06-02
plugin id60111
published2012-07-24
reporterThis script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/60111
titleFlashFXP < 4.2.0.1730 ListIndex TListBox Handling Remote Overflow
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(60111);
  script_version("1.8");
  script_cvs_date("Date: 2019/12/04");

  script_cve_id("CVE-2012-4992");
  script_bugtraq_id(52259);
  script_xref(name:"EDB-ID", value:"18555");

  script_name(english:"FlashFXP < 4.2.0.1730 ListIndex TListBox Handling Remote Overflow");
  script_summary(english:"Checks version of FlashFXP");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has an FTP client that is affected by a buffer
overflow vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote host is running a version of FlashFXP prior to 4.2.0.1730. 
It therefore is reportedly has a buffer overflow vulnerability
involving the TListbox and TComboBox VCL components. 

To exploit the vulnerability remotely, an attacker would need to know
the included filters of the connected client to send large strings. 

Successful exploitation would allow an attacker to execute arbitrary
code within the context of the affected application.");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2012/Mar/7");
  # https://www.flashfxp.com/forum/flashfxp/news/15473-flashfxp-4-2-released.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?36d5d30c");
  script_set_attribute(attribute:"solution", value:
"Upgrade to FlashFXP 4.2.0 (4.2.0.1730) 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:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2012-4992");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/03/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/03/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/07/24");

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

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

  script_copyright(english:"This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("flashfxp_installed.nasl");
  script_require_keys("SMB/FlashFXP/Installed");

  exit(0);
}

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

kb_base = "SMB/FlashFXP/";
appname = "FlashFXP";

get_kb_item_or_exit(kb_base + 'Installed');

installs = get_kb_list(kb_base + 'Installs/*');
if (isnull(installs)) exit(1, 'The \'' + kb_base + 'Installs KB list is missing.');

info = '';
info2 = '';
vuln = 0;
foreach install (keys(installs))
{
  path = installs[install];
  version = install - (kb_base + 'Installs/');

  fix = '4.2.0.1730';
  if (ver_compare(ver:version, fix:fix, strict:FALSE) < 0)
  {
    vuln++;
    info += 
      '\n  Path              : ' + path +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fix + '\n';
  }
  else info2 += ' and ' + version;
}

if (info)
{
  if (report_verbosity > 0) security_hole(port:get_kb_item('SMB/transport'), extra:info);
  else security_hole(get_kb_item('SMB/transport'));
  exit(0);
}

if (info2)
{
  info2 -= ' and ';
  if (' and ' >< info2) be = 'are';
  else be = 'is';

  exit(0, 'The host is not affected since ' + appname + ' ' + info2 + ' ' + be + ' installed.');
}
else exit(1, 'Unexpected error - \'info2\' is empty.');

References