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October 2007

3445 - IBM Lotus Domino IMAP Buffer Overflow Vulnerability

ID: 3445
Date: 25/10/2007

Title: 3445 - IBM Lotus Domino IMAP Buffer Overflow Vulnerability
Platform level affected:Net Application - Enterprise
Hardware components affected:Mainframe
Specific operating systems components affected: Mainframe OS
Net-enabled software: Enterprise Application
Other software: Mail Client
Remediation Summary:Update your copy of the software with the download available from the supplier.
Vendors affected:IBM
Applications affected:Lotus Domino
Adversity source: Unknown
Attack Vector: Vulnerability exploitation
Virulence: Unknown
Warning Status: Imminent
Potential Damage: Remote execution/modification
Possible Duration: Open Ended
Availability of fix: Available
Type of fix: Patch
Source: IBM, iDefence
Reliability of source: Known
Source URL: http://www-1.ibm.com/support/docview.wss?rs=477&uid=swg21270623
CVE: CVE-2007-3510
Abstract: Remote exploitation of a buffer overflow vulnerability within IBM Corp.'s Lotus Domino allows attackers to execute arbitrary code in the context of the IMAP service.

IBM Lotus Domino IMAP Buffer Overflow Vulnerability

iDefense Security Advisory 10.23.07
http://labs.idefense.com/intelligence/vulnerabilities/
Oct 23, 2007

I. BACKGROUND

IBM Lotus Domino Server software provides messaging, calendaring and scheduling capabilities on a variety of operating systems. More information about the product is available at the following URL.

http://www-142.ibm.com/software/sw-lotus/domino

II. DESCRIPTION

Remote exploitation of a buffer overflow vulnerability within IBM Corp.'s Lotus Domino allows attackers to execute arbitrary code in the context of the IMAP service.

This vulnerability exists within the IMAP component of a Domino Server.
The problem specifically lies in the handling of mailbox names within specific commands. If a user has subscribed to a mailbox with an overly long name, certain commands will copy the user-supplied mailbox name into a fixed-size stack buffer without proper validation.

III. ANALYSIS

Exploitation allows attackers to execute arbitrary code in the context of the IMAP service. In order to conduct the attack, the attacker must be able to establish a TCP session with the IMAP service on TCP port 143. Valid credentials are required to access the vulnerable code.

Under Windows, the privileges gained are (by default) that of the SYSTEM user. This allows an attacker to take complete control of the compromised system.

Although the UNIX version of the service does not run as root, it does run as the same user as many other components of the Lotus Domino Server. Because of this an attacker may gain access to sensitive information or be able to maliciously subvert the system in other ways.

IV. DETECTION

iDefense has confirmed the existence of this vulnerability within version 7.0.2.2 of Lotus Domino running on Linux as well as Windows Server 2003. Previous versions, as well as builds for other platforms, are suspected to be vulnerable.

V. WORKAROUND

Employing firewalls to limit access to the affected service will mitigate exposure to this vulnerability.

VI. VENDOR RESPONSE

IBM Lotus has addressed this vulnerability within versions 6.5.6 Fix Pack 2 (FP2), 7.0.3 and 8.0 of Lotus Domino. For more information, visit the following URL.

http://www-1.ibm.com/support/docview.wss?rs=477&uid=swg21270623

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-3510 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

06/27/2007 Initial vendor notification
06/28/2007 Initial vendor response
10/23/2007 Coordinated public disclosure

IX. CREDIT

This vulnerability was reported to iDefense by Manuel Santamarina Suarez.

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http://labs.idefense.com/methodology/vulnerability/vcp.php

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