Transcript Cisco Router Hacking Group 8 Vernon Guishard Kelvin Aguebor

Cisco Router Hacking
Group 8
Vernon Guishard
Kelvin Aguebor
ECE 4112
Introduction
• Cisco Systems, Inc. sells networking and communications technology and
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services.
Cisco is known for creating the first commercially successful multiprotocol router.
March 2000, Cisco had the market capitalization of $500 billion.
Currently, it has a market cap of $175 billion, controls 58% of the market
sale of routers.
The Cisco routers have been more likely to have attacks.
Large market share can lead to attacks being devastating for the internet.
Identifying Routers and Vulnerabilities
• Nmap is used to identify the router.
– OS fingerprinting
• Telnet is another solution to track down routers.
– Trademark Cisco Banner “User Access Verification”
• SING is used to identify the router.
– It uses ICMP packets to find the router
• Nessus can be used to find vulnerabilities.
Cisco Vulnerabilities
• Console Password Recovery
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All Cisco routers and switches affected
Not regarded as a vulnerability
A way for System Admin to recover lost passwords
May be used by hackers who have physical access to machines
• HTTP Configuration Arbitrary Administrative Access
Vulnerability
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Cisco IOS release 11.3 or higher, are vulnerable.
Attacker can gain access to a router without authentication
Attacker can completely control, change, and configure the device
http://10.0.1.252/level/99/exec/show/config
Cisco Vulnerabilities
• Router Denial of Service (DOS) Vulnerability
– It affects all Cisco routers and switches from releases 11.1 through 12.1
– Causes the routers and switches to stop forwarding packets on specific
interface
– IPv4 packets with protocol type of 53, 55, 77 or 103 causes input queue
to be flagged as full
• Telnet Buffer Overflow Vulnerability
– Cisco Broadband Operating System (CBOS), an operating system for
the Cisco 600 family of routers are vulnerable
– Extremely long telnet passwords cause the router to crash then reboot
– Attacker can repeat until fixed, causing a DOS
Solutions to Vulnerabilities
• Vulnerabilities know by Cisco and Patches Released
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Most lingering vulnerabilities due to poor network administration
Upgrade Cisco IOS
Use access-list if not able to upgrade
TACAS or Radius effective in preventing HTTP vulnerability
Lab Procedures
• Section 1: Console Password Exploit
– Using hyper terminal to access routers
– Obtaining enable password and enable secret of the router
• Section 2: Identifying Cisco Routers
– Using NMAP and telnet to identify routers
• Section 3: Network Exploits
– Using the Cisco Global Exploit tool
– Protecting against the Cisco Global Exploit tool
References
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http://en.wikipedia.org/wiki/Terminal_emulator
http://www.securityfocus.com/infocus/1734
http://www.securityfocus.com/infocus/1749
http://secure-o-gram.blogspot.com/2005/11/ios-exploit-and-auditingtools.html
• http://www.cisco.com/warp/public/707/cisco-sn-20040326exploits.shtml#details
• http://www.milw0rm.com/exploits/
• http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_not
e09186a008022493f.shtml
Questions?