Mandriva Linux Security Advisory 2009-056 – The netsnmp_udp_fmtaddr function (snmplib/snmpUDPDomain.c) in net-snmp 5.0.9 through 5.4.2, when using TCP wrappers for client authorization, does not properly parse hosts.allow rules, which allows remote attackers to bypass intended access restrictions and execute SNMP queries, related to source/destination IP address confusion. The updated packages have been patched to prevent this.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75208/MDVSA-2009-056.txt
Source: https://packetstormsecurity.com/files/75208/Mandriva-Linux-Security-Advisory-2009-056.html