full-disclosure - Pre-Auth remote crash in NanoSSH on Avaya Ethernet Routing switch (ERS) 5698 and 5698-PoE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20130717115701.GN26243@suse.de>
Date: Wed, 17 Jul 2013 13:57:01 +0200
From: Marcus Meissner <meissner@...e.de>
To: full-disclosure@...ts.grok.org.uk
Subject: Pre-Auth remote crash in NanoSSH on Avaya
	Ethernet Routing switch	(ERS) 5698 and 5698-PoE

Hi,

Various openssh 6.2p1 users including our administrators
stumbled over this nice bug in the "nanossh server" during pre authentication
phase within nanossh ( https://www.mocana.com/for-device-manufacturers/nanossh/ )

Bug at openssh bugzilla:
	https://bugzilla.mindrot.org/show_bug.cgi?id=2116
	http://www.gossamer-threads.com/lists/openssh/bugs/55880  

Basically if the HMAC list is unexpected long (>1) the remote nanossh
daemon will crash. Unclear if code execution, but well, I would not bet against it.

Also unclear if more than the listed Nortel switches are affected, or all
nanossh deployers, but probably yes.

Ciao, Marcus

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/