Mandriva Linux Security Advisory 2013-300
http://packetstormsecurity.com/files/124552/MDVSA-2013-300.txt
Mandriva Linux Security Advisory 2013-300 - Buffer overflow in the unpacksms16 function in apps/app_sms.c in Asterisk Open Source 1.8.x before 1.8.24.1, 10.x before 10.12.4, and 11.x before 11.6.1; Asterisk with Digiumphones 10.x-digiumphones before 10.12.4-digiumphones; and Certified Asterisk 1.8.x before 1.8.15-cert4 and 11.x before 11.2-cert3 allows remote attackers to cause a denial of service via a 16-bit SMS message. The updated packages has been upgraded to the 11.7.0 version which resolves various upstream bugs and is not vulnerable to this issue.