Vulnerabilities > CVE-2005-0851 - Infinite Loop vulnerability in Filezilla-Project Filezilla Server

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
filezilla-project
CWE-835
nessus
NVD
Published: 2005-05-02
Updated: 2020-07-28

Summary

FileZilla FTP server before 0.9.6, when using MODE Z (zlib compression), allows remote attackers to cause a denial of service (infinite loop) via certain file uploads or directory listings.

Vulnerable Configurations

Part Description Count
Application
Filezilla-Project
1

Common Weakness Enumeration (CWE)

Nessus

NASL familyFTP
NASL idFILEZILLA_DENIAL.NASL
descriptionThe remote host is running a version of FileZilla server with the following denial of service vulnerabilities : - Requesting a file containing the reserved name of a DOS device (e.g. CON, NUL, COM1, etc.) can cause the server to freeze. - Downloading a file or directory listing with MODE Z enabled (zlib compression) can cause an infinite loop.
last seen2020-06-01
modified2020-06-02
plugin id17593
published2005-03-22
reporterThis script is Copyright (C) 2005-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/17593
titleFileZilla FTP Server Multiple DoS
code
#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");


if(description)
{
 script_id(17593);
 script_cve_id("CVE-2005-0850", "CVE-2005-0851");
 script_bugtraq_id(12865);
 script_xref(name:"Secunia", value:"14664");
 script_version("1.15");

 script_name(english:"FileZilla FTP Server Multiple DoS");
 script_summary(english:"Determines the presence of FileZilla");

 script_set_attribute(
   attribute:"synopsis",
   value:"The remote FTP server has multiple denial of service vulnerabilities."
 );
 script_set_attribute( attribute:"description",  value:
"The remote host is running a version of FileZilla server with the
following denial of service vulnerabilities :

  - Requesting a file containing the reserved name of a DOS
    device (e.g. CON, NUL, COM1, etc.) can cause the
    server to freeze.

  - Downloading a file or directory listing with MODE Z
    enabled (zlib compression) can cause an infinite loop." );
 script_set_attribute(
   attribute:"see_also",
   value:"http://sourceforge.net/project/shownotes.php?release_id=314473"
 );
 script_set_attribute(
   attribute:"solution", 
   value:"Upgrade to FileZilla Server 0.9.6 or later."
 );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:"plugin_publication_date", value: "2005/03/22");
 script_set_attribute(attribute:"vuln_publication_date", value: "2005/03/22");
 script_cvs_date("Date: 2018/07/11 17:09:24");
 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:"FTP");
 
 script_copyright(english:"This script is Copyright (C) 2005-2018 Tenable Network Security, Inc.");
 
 script_dependencies("ftp_anonymous.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);

if(egrep(pattern:"^220.*FileZilla Server version 0\.([0-8]\.|9\.[0-5][^0-9])", string:banner))
        security_hole(port);

References