Vulnerabilities > CVE-2002-0698 - Classic Buffer Overflow vulnerability in Microsoft Exchange Server 5.5

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-120
nessus
NVD
Published: 2002-08-12
Updated: 2023-11-07

Summary

Buffer overflow in Internet Mail Connector (IMC) for Microsoft Exchange Server 5.5 allows remote attackers to execute arbitrary code via an EHLO request from a system with a long name as obtained through a reverse DNS lookup, which triggers the overflow in IMC's hello response.

Vulnerable Configurations

Part Description Count
Application
Microsoft
5

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 familySMTP problems
NASL idSMTP_MS02-037.NASL
descriptionA security vulnerability results because of an unchecked buffer in the IMC code that generates the response to the EHLO protocol command. If the buffer were overrun with data it would result in either the failure of the IMC or could allow the attacker to run code in the security context of the IMC, which runs as Exchange5.5 Service Account. ** Nessus only uses the banner header to determine if this vulnerability exists and does not check for or attempt an actual overflow.
last seen2020-06-01
modified2020-06-02
plugin id11053
published2002-07-29
reporterThis script is Copyright (C) 2002-2018 SECNAP Network Security, LLC
sourcehttps://www.tenable.com/plugins/nessus/11053
titleMS02-037: Microsoft Exchange EHLO Long Hostname Overflow
code
#
# This script was written by Michael Scheidell SECNAP Network Security
#
# See the Nessus Scripts License for details
#

# Changes by Tenable:
# - Revised plugin title, output formatting (9/12/09)
# - Updated to use compat.inc, added CVSS score (11/20/2009)
# - Add MSKB script_xref (8/29/17)

include("compat.inc");

if(description)
{
 script_id(11053);
 script_version("1.23");

 script_cve_id("CVE-2002-0698");
 script_bugtraq_id(5306);
 script_xref(name:"MSFT", value: "MS02-037");
 script_xref(name:"MSKB", value:"326322");

 script_name(english:"MS02-037: Microsoft Exchange EHLO Long Hostname Overflow");
 
 script_set_attribute(attribute:"synopsis", value:
"The remote host has an application that is affected by a 
buffer overflow vulnerability." );
 script_set_attribute(attribute:"description", value:
"A security vulnerability results because of an unchecked 
buffer in the IMC code that generates the response to the
EHLO protocol command. If the buffer were overrun with data 
it would result in either the failure of the IMC or could allow 
the attacker to run code in the security context of the IMC,
which runs as Exchange5.5 Service Account.

** Nessus only uses the banner header to determine
   if this vulnerability exists and does not check
   for or attempt an actual overflow." );
 script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2002/ms02-037");
 script_set_attribute(attribute:"solution", value:
"See the vendor advisory for patch information.");
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/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: "2002/07/29");
 script_set_attribute(attribute:"vuln_publication_date", value: "2002/07/24");
 script_cvs_date("Date: 2018/11/15 20:50:24");

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

 script_summary(english:"Checks to see if remote IMC SMTP version is vulnerable to buffer overflow");
 script_category(ACT_GATHER_INFO);
 script_copyright(english:"This script is Copyright (C) 2002-2018 SECNAP Network Security, LLC");
 script_family(english:"SMTP problems");
 script_dependencie("find_service1.nasl", "smtpserver_detect.nasl");
 script_require_keys("SMTP/microsoft_esmtp_5");
 script_require_ports("Services/smtp", 25);
 exit(0);
}

#

include("smtp_func.inc");

port = get_kb_item("Services/smtp");
if(!port)port = 25;
data = get_smtp_banner(port:port);
if(!data)exit(0);

if(!egrep(pattern:"^220.*Microsoft Exchange Internet.*", 
	 string:data))exit(0);

# needs to be 5.5.2656.59 or GREATER.
# this good:

#220 proliant.fdma.com ESMTP Server (Microsoft Exchange
#Internet Mail Service 5.5.2656.59) ready

#this old:

#220 proliant.fdma.com ESMTP Server (Microsoft Exchange
#Internet Mail Service 5.5.2653.13) ready

if(egrep(string:data, pattern:"Service.5\.[6-9]"))
  exit(0);

if(egrep(string:data, pattern:"Service.5\.5\.[3-9]"))
  exit(0);

if(egrep(string:data, pattern:"Service.5\.5\.2[7-9]"))
  exit(0);

if(egrep(string:data, pattern:"Service.5\.5\.26[6-9]"))
  exit(0);

if(egrep(string:data, pattern:"Service.5\.5\.265[6-9]"))
  exit(0);
security_hole(port);

References