Are versions prior to 8.13 vulnerable? Specifically, is 8.05 vulnerable?
Darin.
----- Original Message -----
From: "Beach Computers" <[EMAIL PROTECTED]>
To: <IMail_Forum@list.ipswitch.com>
Sent: Thursday, March 10, 2005 3:45 PM
Subject: [IMail Forum] Ipswitch Collaboration Suite IMAP EXAMINE Buffer
Overflow Vulnerability
FYI:
Ipswitch Collaboration Suite IMAP EXAMINE Buffer Overflow Vulnerability
iDEFENSE Security Advisory 03.10.05
www.idefense.com/application/poi/display?id=216&type=vulnerabilities
March 10, 2005
I. BACKGROUND
Ipswitch Collaboration Suite (ICS) is a comprehensive communication and
collaboration solution for Microsoft Windows with a customer base of over 53
million users. More information is available on the vendor's
website:
http://www.ipswitch.com/products/IMail_Server/index.html
II. DESCRIPTION
Exploitation of a remote buffer overflow within the IMAP daemon of Ipswitch
Collaboration Suite allows attackers to execute arbitrary code with
administrator privileges.
The vulnerability specifically exists due to insufficient handling of overly
long arguments passed to the EXAMINE handler function. The EXAMINE command
selects a mailbox so that messages within the mailbox may be accessed with
read-only privileges. EXAMINE requests with malformed mailbox names of 259
bytes will overwrite the saved stack frame pointer, resulting in potential
process execution control. It should be noted that IMAP will append a '/'
character to your supplied mailbox name so the most significant byte of the
frame pointer will be 0x2e. The output below shows successful control of the
frame pointer.
(668.f8): Access violation - code c0000005 (first chance) First chance
exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=00000006 ebx=008943b0 ecx=42424242
edx=00c8fad4 esi=008943b0 edi=00000013
eip=0078626d esp=00c9fd20 ebp=2e434343
iopl=0 nv up ei pl zr na po nc
cs=001b ss=0023 ds=0023 es=0023
fs=0038 gs=0000 efl=00000246
0078626d ?? ???
Frame pointer overwrites may allow attackers to redirect program flow when
the current function returns. It should be noted that the IMAP EXAMINE
command is only available after successful authentication.
III. ANALYSIS
Successful exploitation allows remote attackers to execute arbitrary code
under administrator privileges. The EXAMINE IMAP command is only valid after
authentication has occurred, however due to the nature of IMAP servers
serving a large user base, this requirement only slightly reduces exposure
to the vulnerability.
IV. DETECTION
iDEFENSE has confirmed that the IMAP4 daemon (IMAP4d32.exe ver.
12.8.27.14) shipping with IMail Server version 8.13 is vulnerable.
IMail Server is now packaged as part of Ipswitch Collaboration Suite.
It is suspected that earlier versions are vulnerable as well.
V. WORKAROUND
Use application level content filtering on overly long IMAP commands.
VI. VENDOR RESPONSE
This vulnerability is addressed in IMail Server 8.15 Hotfix 1 (February 3,
2005), which is available for download at:
ftp://ftp.ipswitch.com/Ipswitch/Product_Support/IMail/IM815HF1.exe
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the name
CAN-2005-0707 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
03/02/2005 Initial vendor notification
03/08/2005 Initial vendor response
03/10/2005 Public disclosure
IX. CREDIT
Nico Steinhardt is credited with this discovery.
Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp
Free tools, research and upcoming events http://labs.idefense.com
X. LEGAL NOTICES
Copyright (c) 2005 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 email
[EMAIL PROTECTED] 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.
To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html
List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html
List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
