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defcom.easycom.txt

defcom.easycom.txt
Posted Feb 2, 2001
Authored by Defcom Labs | Site defcom.com

Defcom Labs Advisory def-2001-06 - The Easycom/Safecom print server from I-Data International contains multiple vulnerabilities that allow a malicious user to bring down the print server. Execution of arbitrary code is also possible. Tested against Easycom/Safecom, firmware v404.590.

tags | exploit, arbitrary, vulnerability
SHA-256 | d22d8ee0925169a7a2b0a8f0219d7d8ba6ec919d7f13cb955973d4c2a20942ee

defcom.easycom.txt

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======================================================================
Defcom Labs Advisory def-2001-06

Easycom/Safecom 10/100 Multiple DoS

Author: Peter Gründl <peter.grundl@defcom.com>
Release Date: 2001-01-23
======================================================================
------------------------=[Brief Description]=-------------------------
The Easycom/Safecom print server from I-Data International contains
multiple vulnerabilites that allow a malicious user to bring down the
print server. Execution of arbitrary code is also possible.

------------------------=[Affected Systems]=--------------------------
- Easycom/Safecom, firmware 404.590
- Most likely older firmware revisions as well

----------------------=[Detailed Description]=------------------------
The print server has a web service running on port 80 and on port 631.
Both are vulnerable to a long URL request. The long URL results in a
buffer overflow on the server. The effect can either be that the unit
crashes or execution of arbitrary code on the server.

The PrintGuide service on port 5742 will cease to respond, if you send
two bursts (80 connects in each burst) of null characters to the port.

The FTP service on TCP port 21 is vulnerable to data flooding. The
flooding results in the unit being disconnected from the network.

The web services on port 80 and port 631 are both vulnerable to long
HTTP requests. An infinite HTTP request will result in the unit being
disconnected from the network. This is done by eg. issuing a normal
GET request and filling A's into an HTTP header field, like "host:".

The TCP/IP implementation on the Easycom/Safecom unit is vulnerable
to flooding. Sending large burst of "normal" network packets to the
unit at eg. 10 mbit will result in the unit being disconnected from
the network.

---------------------------=[Workaround]=-----------------------------
No vendor supplied workaround known. You could put your unit behind a
filtering router, and make sure the ports aren't accessible from the
network (except from the managing console, of course).

-------------------------=[Vendor Response]=--------------------------
This issue was brought to the vendor's attention on the 30th of
November, 2000. Vendor promises to look into it, but has not yet come
up with any indication on when a fix would be available.

======================================================================
This release was brought to you by Defcom Labs

labs@defcom.com www.defcom.com
======================================================================



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