Asterisk issue

Dear partners,
as you know asterisk-based solutions are widely used on VOIP market, so we would like to pay your attention to existing security issue with Asterisk described on official site:
Please, be sure you closed guest login and your current logins and passwords are not very simple.

The new scheme and way of cheating:

Step 1: hacking Asterisk
Step 2: initiating of algorithm which select calls one-by-one starting with Israel phone number 9725972280** with different variations
Step 3: after receiving a successful results - new range of calls to Somalia 25230221564, 25240902079 and others.
Step 4: volume of traffic to Global mobile Satellite System (very expensive destination), number - 881935211987.

Please, be sure this number is closed in your systems as a fraud number.
If you know any other fraud numbers - please send them to us and we will publish them as well.
Thank you.