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The perl_trapd_handler function in perl/TrapReceiver/TrapReceiver.xs in Net-SNMP 5.7.3.pre3 and earlier, when using certain Perl versions, allows remote attackers to cause a denial of service (snmptrapd crash) via an empty community string in an SNMP trap, which triggers a NULL pointer dereference within the newSVpv function in Perl. Refer to: https://bugzilla.redhat.com/show_bug.cgi?id=1072044 Signed-off-by: Junling Zheng <zhengjunling@huawei.com> Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>