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AUSCERT External Security Bulletin Redistribution
ESB-2008.0228 -- [Appliance]
Canon - vulnerable to FTP Bounce
3 March 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: imageRUNNER 2230/2830/3530
imageRUNNER 3025/3030/3035/3045
imageRUNNER 2270/2870/3570/4570
imageRUNNER 5070/5570/6570
imageRUNNER 5050/5055/5065/5075
imageRUNNER 8070/85+/9070/105+
imageRUNNER 7086/7095/7105
Color imageRUNNER C3220/2620
Color imageRUNNER C2880/3380
Color imageRUNNER C2550
Color imageRUNNER C4080/4580/5180/5185
Color imageRUNNER LBP5960
Color imageRUNNER LBP5360
imageRUNNER C3170
imageRUNNER C5800/6800
imageRUNNER C5870U/6870U
imageRUNNER C5058/5068
imageRUNNER LBP3460
imagePRESS C7000VP
imagePRESS C1
Publisher: US-CERT
Operating System: Network Appliance
Impact: Inappropriate Access
Access: Remote/Unauthenticated
CVE Names: CVE-2008-0303
Original Bulletin: http://www.kb.cert.org/vuls/id/568073
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Vulnerability Note VU#568073
Canon digital multifunction copiers FTP bounce vulnerability
Overview
Some models of Canon digital multifunction copiers are vulnerable to the FTP
bounce attack.
I. Description
- From the Problems With The FTP PORT Command document:
The FTP Bounce Attack
To conform with the FTP protocol, the PORT command has the originating
machine specify an arbitrary destination machine and port for the data
connection. However, this behavior also means that an attacker can open
a connection to a port of the attacker's choosing on a machine that
may not be the originating client.
Some Canon digital multifunction printers contain an FTP server that is
vulnerable to the FTP bounce attack.
II. Impact
A remote, unauthenticated attacker may be able to conduct port scans or send
arbitrary (TCP) traffic to other hosts.
III. Solution
We are currently unaware of a practical solution to this problem.
The following workarounds may mitigate this vulnerability.
Disable the affected FTP server
Administrators and users should either turn off the vulnerable FTP server or
disable anonymous access. See the Steps to take to clear vulnerability section
of the Canon Web Advisory: Digital multifunction printer vulnerability for more
information.
Use host based firewalls
Administrators and users can use host-based firewalls to prevent affected
printers and other devices from creating connections to arbitrary TCP ports.
Systems Affected
Vendor Status Date Updated
Canon Vulnerable 28-Feb-2008
References
http://www.usa.canon.com/html/security/pdf/CVA-001.pdf
http://www.canon-europe.com/For_work/Canon_Europe_CBS_Web_Advisory_Digital_Multifunction_Printers.asp
http://www.cert.org/tech_tips/ftp_port_attacks.html#3.2
http://nmap.org/hobbit.ftpbounce.txt
Credit
Thanks to Canon for information that was used in this report.
Canon credits Nate Johnson and the Indiana University for reporting
this vulnerability.
This document was written by Ryan Giobbi.
Other Information
Date Public 02/28/2008
Date First Published 02/28/2008 02:46:21 PM
Date Last Updated 02/28/2008
CERT Advisory
CVE Name CVE-2008-0303
US-CERT Technical Alerts
Metric 0.72
Document Revision 10
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