net-snmp-5.7.2: fix CVE-2014-2284

The Linux implementation of the ICMP-MIB in Net-SNMP 5.5 before
5.5.2.1, 5.6.x before 5.6.2.1, and 5.7.x before 5.7.2.1 does
not properly validate input, which allows remote attackers
to cause a denial of service via unspecified vectors.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2284


Signed-off-by: yanjun.zhu <yanjun.zhu@windriver.com>
Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Joe MacDonald <joe@deserted.net>