Vulnerabilities > CVE-2009-0884 - Classic Buffer Overflow vulnerability in Filezilla-Project Filezilla Server

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
filezilla-project
CWE-120
nessus
NVD
Published: 2009-03-12
Updated: 2020-07-28

Summary

Buffer overflow in FileZilla Server before 0.9.31 allows remote attackers to cause a denial of service via unspecified vectors related to SSL/TLS packets.

Vulnerable Configurations

Part Description Count
Application
Filezilla-Project
8

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 idFILEZILLA_SERVER_0931.NASL
descriptionAccording to its banner, the version of FileZilla Server installed on the remote host is older than version 0.9.31. An unspecified vulnerability in the SSL code for such versions can be exploited by a remote attacker to trigger a denial of service condition.
last seen2020-06-01
modified2020-06-02
plugin id45112
published2010-03-19
reporterThis script is Copyright (C) 2010-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/45112
titleFileZilla Server < 0.9.31 Denial of Service
code
#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");

if (description)
{
  script_id(45112);
  script_version("1.9");

  script_cve_id("CVE-2009-0884");
  script_bugtraq_id(34006);
  script_xref(name:"Secunia", value:"34089");

  script_name(english:"FileZilla Server < 0.9.31 Denial of Service");
  script_summary(english:"Checks the banner version of FileZilla Server"); 
  
  script_set_attribute(attribute:"synopsis", value:
"The remote FTP server is prone to a denial of service attack.");
 script_set_attribute(attribute:"description", value:
"According to its banner, the version of FileZilla Server installed on
the remote host is older than version 0.9.31.  An unspecified
vulnerability in the SSL code for such versions can be exploited by a
remote attacker to trigger a denial of service condition." );
  script_set_attribute(attribute:"see_also", value:"http://sourceforge.net/project/shownotes.php?release_id=665428" );
  script_set_attribute(attribute:"solution", value:
"Upgrade to FileZilla Server version 0.9.31 or later." );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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_cwe_id(119);
  script_set_attribute(attribute:"vuln_publication_date", value: "2009/03/03");
  script_set_attribute(attribute:"patch_publication_date", value: "2009/03/03");
  script_set_attribute(attribute:"plugin_publication_date", value: "2010/03/19");
 script_cvs_date("Date: 2018/07/11 17:09:26");
  script_set_attribute(attribute:"plugin_type", value:"remote");
   script_set_attribute(attribute:"cpe", value:"cpe:/a:filezilla:filezilla_server");
  script_end_attributes();
 
  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");
  script_copyright(english:"This script is Copyright (C) 2010-2018 Tenable Network Security, Inc.");

  script_dependencies("ftpserver_detect_type_nd_version.nasl");
  script_require_ports("Services/ftp", 21);
  script_require_keys("ftp/filezilla");
  exit(0);
}

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

port = get_ftp_port(default: 21);

banner = get_ftp_banner(port:port);
if (!banner) exit(1, "No FTP banner found on port "+port+".");
if ("FileZilla Server" >!< banner) exit(0, "Banner on port "+port+" doesn't look like FileZilla Server.");

banner = strstr(banner, "FileZilla Server");
banner = banner - strstr(banner, '\r\n');
if (ereg(pattern:"FileZilla Server version 0.([0-8]\.|9\.([0-9][a-e]*$|[0-2][0-9][a-e]*|30($|[^0-9])))",string:banner))
{
  if(report_verbosity > 0)
  {
    report = '\n' +
      'The remote FileZilla server returned the following banner :\n' +
      '\n' +
      "  " + banner + '\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port); 
}

References