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iDEFENSE Security Advisory 2008-10-14.1

iDEFENSE Security Advisory 2008-10-14.1
Posted Oct 14, 2008
Authored by iDefense Labs, Stephen Fewer | Site idefense.com

iDefense Security Advisory 10.14.08 - Remote exploitation of an arbitrary command execution vulnerability in Microsoft Corp.'s Host Integration Server 2006 could allow an attacker to execute arbitrary code with the privileges of the affected service. The RPC interface exposes several methods that an unauthenticated attacker can use to execute arbitrary programs on the server. RPC opcodes 1 and 6 both allow an attacker to call the CreateProcess() function with full control over the application started, as well as the command line passed to it. This allows an attacker to run arbitrary programs on the server. iDefense has confirmed the existence of this vulnerability in Host Integration Server 2006. Previous versions may also be affected.

tags | advisory, remote, arbitrary
advisories | CVE-2008-3466
SHA-256 | b9fe753909d642655b6aa83a4515cd2e1b53dc02408456d1fb3e5c5f01d9aca4

iDEFENSE Security Advisory 2008-10-14.1

Change Mirror Download
iDefense Security Advisory 10.14.08
http://labs.idefense.com/intelligence/vulnerabilities/
Oct 14, 2008

I. BACKGROUND

The Host Integration Server is an application suite that is used to
communicate with IBM mainframe servers. One of the components of the
suite is a remote management interface. This interface is implemented
by an RPC server that listens on a dynamic TCP port. The UUID of the
vulnerable RPC service is 'ed6ee250-e0d1-11cf-925a-00aa00c006c1'. For
more information regarding the Host Integration Server, see the
vendor's website found at the following URL.

http://www.microsoft.com/hiserver/default.mspx

II. DESCRIPTION

Remote exploitation of an arbitrary command execution vulnerability in
Microsoft Corp.'s Host Integration Server 2006 could allow an attacker
to execute arbitrary code with the privileges of the affected service.

The RPC interface exposes several methods that an unauthenticated
attacker can use to execute arbitrary programs on the server. RPC
opcodes 1 and 6 both allow an attacker to call the CreateProcess()
function with full control over the application started, as well as the
command line passed to it. This allows an attacker to run arbitrary
programs on the server.

III. ANALYSIS

Exploitation of this vulnerability results in the execution of arbitrary
code with the privileges of the affected service. The privileges gained
depend on the user account that the Host Integration Server is
configured to use during installation. The service does not require
SYSTEM privileges to run.

IV. DETECTION

iDefense has confirmed the existence of this vulnerability in Host
Integration Server 2006. Previous versions may also be affected.

V. WORKAROUND

Use the Service Control Manager to disable the SNA RPC service, and
prevent it from starting automatically. This will prevent the
vulnerable service from running, but will also prevent remote
management. Firewalling the TCP port is not a valid workaround, since
the port used for communication is dynamically assigned when the
service starts.

VI. VENDOR RESPONSE

Microsoft has officially addressed this vulnerability with Security
Bulletin MS08-059. For more information, consult their bulletin at the
following URL.

http://www.microsoft.com/technet/security/bulletin/ms08-059.mspx

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-3466 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

05/27/2008 Initial vendor notification.
05/27/2008 Initial vendor response.
10/14/2008 Coordinated public disclosure.

IX. CREDIT

This vulnerability was reported to iDefense by Stephen Fewer of Harmony
Security | (www.harmonysecurity.com ).

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events http://labs.idefense.com/

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright © 2008 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.

Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or
reliance on, this information.
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