exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

ISS Security Advisory March 15, 1999

ISS Security Advisory March 15, 1999
Posted Mar 17, 1999

ISS X-Force has discovered a buffer overflow exploit against Microsoft Exchange's LDAP (Lightweight Directory Access Protocol) server which allows read access to the Exchange server directory by using an LDAP client. This buffer overflow consists of a malformed bind request that overflows the buffer and can execute arbitrary code. This attack can also cause the Exchange LDAP service to crash. This vulnerability exists in Microsoft Exchange Server version 5.5.

SHA-256 | 7cc4f2cda9e3d56aabfe8ea736c0d7a2e9be2646b048a7a44a6c5ca955f2aaee

ISS Security Advisory March 15, 1999

Change Mirror Download

From xforce@iss.net Mon Mar 15 22:33:45 1999
From: X-Force <xforce@iss.net>
To: alert@iss.net
Cc: X-Force <xforce@iss.net>
Date: Mon, 15 Mar 1999 21:55:24 -0500 (EST)
Subject: ISSalert: ISS Security Advisory: LDAP Buffer overflow against Microsoft Directory Services

TO UNSUBSCRIBE: email "unsubscribe alert" in the body of your message to
majordomo@iss.net Contact alert-owner@iss.net for help with any problems!
---------------------------------------------------------------------------


-----BEGIN PGP SIGNED MESSAGE-----

ISS Security Advisory
March 15, 1999

LDAP Buffer overflow against Microsoft Directory Services

Synopsis:

ISS X-Force has discovered a buffer overflow exploit against Microsoft
Exchange's LDAP (Lightweight Directory Access Protocol) server which
allows read access to the Exchange server directory by using an LDAP
client. This buffer overflow consists of a malformed bind request that
overflows the buffer and can execute arbitrary code. This attack can also
cause the Exchange LDAP service to crash. This vulnerability exists in
Microsoft Exchange Server version 5.5.

Description:

This exploit occurs during the LDAP binding process. Binding involves
logging in or authenticating to a directory, and consists of sending a
username, a password, and a binding method. There are two methods in
which to use this vulnerablility against an Exchange server. The first
consists of sending a particular type of invalid LDAP bind packet which
will cause an overflow to occur this will cause the LDAP service to crash.
The second uses a large malformed LDAP bind packet that is carefully
crafted to take advantage of the buffer overflow and can be used to
execute arbitrary code.

Recommendations:

Microsoft has made a patch available for the LDAP attack. Patch
information is available at:
http://www.microsoft.com/security/bulletins/ms99-009.asp

Network administrators can protect internal systems from external attack
by adding a rule to a filtering router or firewall of the type: Deny all
incoming TCP packets with a destination port of 389.

Many firewalls or packet filters may already have more restrictive
rulesets that already encompass this filtering rule, in which case the
network is already protected from an external attack. This ruleset would
include filtering all incoming traffic to TCP port 389.

Additional Information:

These vulnerabilities were primarily researched by the ISS X-Force.

________

Copyright (c) 1999 by Internet Security Systems, Inc.

Permission is hereby granted for the electronic redistribution of this
Security Advisory. It is not to be edited in any way without express
consent of the X-Force. If you wish to reprint the whole or any part of
this Security Advisory in any other medium excluding electronic medium,
please e-mail xforce@iss.net for permission.

Internet Security Systems, Inc. (ISS) is the leading provider of adaptive
network security monitoring, detection, and response software that
protects the security and integrity of enterprise information systems. By
dynamically detecting and responding to security vulnerabilities and
threats inherent in open systems, ISS's SAFEsuite family of products
provide protection across the enterprise, including the Internet,
extranets, and internal networks, from attacks, misuse, and security
policy violations. ISS has delivered its adaptive network security
solutions to organizations worldwide, including firms in the Global 2000,
nine of the ten largest U.S. commercial banks, and over 35 governmental
agencies. For more information, call ISS at 678-443-6000 or 800-776-2362
or visit the ISS Web site at http://www.iss.net.

Disclaimer
The information within this paper may change without notice. Use of this
information constitutes acceptance for use in an AS IS condition. There
are NO warranties with regard to this information. In no event shall the
author be liable for any damages whatsoever arising out of or in
connection with the use or spread of this information. Any use of this
information is at the user's own risk.

X-Force PGP Key available at: http://www.iss.net/xforce/sensitive.html as
well as on MIT's PGP key server and PGP.com's key server.

X-Force Vulnerability and Threat Database: http://www.iss.net/xforce

Please send suggestions, updates, and comments to:
X-Force <xforce@iss.net> of Internet Security Systems, Inc.

-----BEGIN PGP SIGNATURE-----
Version: 2.6.3a
Charset: noconv

iQCVAwUBNu3GuzRfJiV99eG9AQF48wP+J1/vW040sA5f9Nz56JEF9s6d/tpainG1
Qw7Jxbry374IFinJZfk/K5FJkdbjJfMcyGfgWJjNriYZJ0EKFkQcRK7XNAUe8AGu
LWaBW4l0v1Qox3ueR3GdCskQ8haK9vpxkFkbPmlefIWKMsVhncQPloJwU3/WyPNV
uLJBWqHEpkU=
=Zp+/
-----END PGP SIGNATURE-----
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close