----------------------------------------------------------------------

Do you have VARM strategy implemented?

(Vulnerability Assessment Remediation Management)  

If not, then implement it through the most reliable vulnerability
intelligence source on the market. 

Implement it through Secunia. 

For more information visit:
http://secunia.com/advisories/business_solutions/

Alternatively request a call from a Secunia representative today to
discuss how we can help you with our capabilities contact us at:
sales@secunia.com

----------------------------------------------------------------------

TITLE:
Asterisk SIP INVITE ACL Security Bypass

SECUNIA ADVISORY ID:
SA37056

VERIFY ADVISORY:
http://secunia.com/advisories/37056/

DESCRIPTION:
A vulnerability has been reported in Asterisk, which can be exploited
by malicious people to bypass certain security restrictions.

The vulnerability is caused due to Asterisk not properly enforcing
ACLs when handling SIP INVITES. This can be exploited to e.g. perform
calls, although the caller's network is forbidden via the "deny" and
"permit" options in sip.conf.

The vulnerability is reported in all Asterisk Open Source 1.6.1
versions prior to 1.6.1.8.

SOLUTION:
Update to version 1.6.1.8 or apply patch.

Asterisk Open Source 1.6.18:
http://downloads.asterisk.org/pub/telephony/asterisk/

Patch:
http://downloads.asterisk.org/pub/security/AST-2009-007-1.6.1.diff.txt

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Thomas Athineou.

ORIGINAL ADVISORY:
http://downloads.asterisk.org/pub/security/AST-2009-007.html

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------