From: full-disclosure-bounces () lists grok org uk [mailto:full-disclosure-
bounces () lists grok org uk] On Behalf Of Sabahattin Gucukoglu
Sent: Friday, October 01, 2010 2:32 PM
To: braillenote () list humanware com
Cc: full-disclosure () lists grok org uk; bugtraq () securityfocus com; me-
mates () sabahattin-gucukoglu com; support () humanware com
Subject: [Full-disclosure] Warning: BrailleNote Apex Offers Read/Write FTP
And Telnet Access To All Comers
BrailleNote Apex offers telnet and FTP access on the standard ports, with
read/write privilege on the entire file system, to all comers. No
authentication is required. BrailleNote is unsafe on any network whose
devices you are not in full charge of, and which (by NAT or firewall) does not
protect BrailleNote from the Internet.
I am happy and sad. In a chance port scan of my entire network looking for
interesting services and protocols that were not accounted for by visible
configuration options in all my devices, I found this disaster staring me in the
face on the least likely candidate of them all. On the one hand, now I don't
need ActiveStink in order to access my files, over the network, from my Mac.
I want these services running, for sure (maybe just FTP) but dammit,
authentication first! On the other hand, there is no doubt my trust in
HumanWare is badly dented, as I was clearly optimistic that they would, and
did, do the right thing and secure the device firmware before shipping it.
Anonymous FTP and telnet are obvious, easily found and effectively
exploited. If it isn't configurable, it shouldn't be enabled. I am quite sure this
was the case before now. The most likely explanation is a build with a test
configuration and services for development still in use on the newest model;
the USB vendor string is further evidence of this. Note to self: that popular
expression about assumptions turns out to be true.
KeySoft version 9.0.2 build 756, Windows CE 6.0, with telnet and FTP services.
While we await an update that either disables the services or allows the user
to specify the authentication credentials, do not use your BrailleNote Apex on
any untrusted network, or if you are network administrator, temporarily
prohibit these devices from connecting to your networks. If "Bad guys" are on
your network, the BrailleNote Apex is, alas, easy meat.
Full-Disclosure - We believe in it.
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