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CERT Coordination Center


Lotus Domino vulnerable to directory traversal, aka "Domino Server Directory Transversal Vulnerability"

Vulnerability Note VU#590487

Original Release Date: 2001-01-10 | Last Revised: 2001-01-10

Overview

Lotus Domino web server may allow malformed URL requests to access files outside the document root of a vulnerable system.

Description

A Lotus Domino server running the HTTP task may permit an intruder to read files on file systems or drives that house Lotus Notes databases. By using a specially crafted URL containing ".." and the name of an existing file, an intruder may be able to cause a Domino server to return the contents of the file to the intruder over the HTTP connection. If this file contains sensitive information, an intruder may be able to leverage that information to gain additional access.

Impact

Intruders can read files outside the normal web root of a Domino server.

Solution

Lotus plans on releasing a new version (R5.0.6a) which addresses this problem as soon as possible. See http://www.lotus.com/security for more details. According to Lotus, the SPR (Software Problem Report) number is KSPR4SPQ5S. When an SPR is fixed, it is posted in the Fix List database on Notes.net. In the meantime, a workaround is possible by using the URL redirection feature of Domino.

Redirect URLs of the form *..* to a harmless location or an error page. See the http://www.lotus.com/security for details or consult your Domino documentation.

Vendor Information

590487
Expand all

Lotus

Notified:  January 06, 2000 Updated:  January 10, 2001

Status

  Vulnerable

Vendor Statement

Lotus Notes Domino R4.x is not vulnerable to this issue.

Lotus Notes Domino R5.x is vulnerable to this issue.

Additional notes:

What is the nature of the vulnerability?
Given a known path and file name, files can accessed from the Domino
server.  This is limited to the file system (or drive) that the Domino
server is installed on.  It is not possible to browse the file system, but
if a file name can be correctly guessed at, it can be accessed.

What versions of Domino are affected?
R5.0 - R5.06 on all operating system platforms (this includes products
running on Domino R5.x as the web server)
R4x is not affected

How can I track this issue?
The SPR (Software Problem Report) number is KSPR4SPQ5S.  Issues can be
tracked via the Fix List database on Notes.net -->
http://www.notes.net/R5FixList.nsf

Are there workarounds available?
There are several measures that can be taken to reduce, but not completely
eliminate, the risk of this vulnerability.  A code fix is currently in
progress and will be made available shortly.

To address the specific issue documented in the advisory, File Protection
documents can be used.  However, it does not address some related issues.
The planned QMU will be required to address this issue completely.

In the Domino Directory, select the server document and click Web/Create
File Protection.
On the Basics tab, in the path field, specify the following extensions (one
document for each path)

     /.nsf/../
    /.ns4/../
    /.box/../

On the Access Control tab, specify Default as No Access.

Other steps to minimize risk:
Limit files stored on the file system where Domino is installed
Password protect the server id
Locally encrypt system databases (and other databases with easily guessable
file names) with the server's id
Rename the server id to something other than server.id
Rename the notes.ini file and launch the server specifying the notes.ini
file

What are Lotus' plans to address this issue?
Lotus is treating this with the highest priority and has a fix being tested
now.   The release number will be R5.0.6a and it will be posted to
http://notes.net as soon as it is available.  We are currently targeting
the end of this week (13-Jan-01).

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

We are aware of public reports that Notes/Domino 4 is also vulnerable to this issue. We have not been able to reproduce that behavior. Additionally, our conversations with Lotus indicate they are aware of the reports as well, but likewise do not believe that version 4 is affected. We will continue investigating.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

The CERT/CC would like to acknowledge Katherine Spanbauer, Senior Product Manager, Notes and Domino Security Lotus Development Corporation for her assistance, and independent researcher Georgi Guninski who discovered this problem.

This document was written by Jeffrey S Havrilla and Shawn Hernan.

Other Information

CVE IDs: None
Severity Metric: 21.60
Date Public: 2001-01-05
Date First Published: 2001-01-10
Date Last Updated: 2001-01-10 20:04 UTC
Document Revision: 19

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