bugtraq - Creating Backdoors in Cisco IOS using Tcl

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>] [thread-next>] [day] [month] [year] [list]

Message-ID: <7B01ACCEDD4FFE48B12A55E2DB16A93026C6FD@dccheltenham.local.irmplc.com>
Date: Tue, 27 Nov 2007 10:48:39 -0000
From: "IRM Research" <research@...plc.com>
To: <bugtraq@...urityfocus.com>, <full-disclosure@...ts.grok.org.uk>
Subject: Creating Backdoors in Cisco IOS using Tcl

Tcl (Tool Command Language) is a scripting language used extensively in
embedded systems, which is easy to use and has some powerful features.
The language has been supported by Cisco IOS for some time now and is
used, for example, in IOS IVR configuration as well as for automating
mundane tasks regularly performed by network administrators. This short
technical briefing describes a technique using Tcl to create a backdoor
within IOS that would allow a remote attacker to execute privileged
commands on a networking device. The document (which includes a
proof-of-concept Tcl script) can be downloaded here:

http://www.irmplc.com/index.php/153-Embedded-Systems-Security