The remote host is missing an update to the system as announced in the referenced advisory.
Update your system with the appropriate patches or software upgrades. http://downloads.digium.com/pub/security/AST-2012-012.html http://downloads.digium.com/pub/security/AST-2012-013.html https://www.asterisk.org/security http://www.vuxml.org/freebsd/4c53f007-f2ed-11e1-a215-14dae9ebcf89.html
The following packages are affected: asterisk asterisk18
CVE CVE-2012-2186, CVE-2012-4737
CVSS Base Score: 9.0