wireshark: multiple vulnerabilities

The pcapng_read_packet_block function in wiretap/pcapng.c in the pcap-ng file parser in Wireshark 1.8.x before 1.8.2 allows user-assisted remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted pcap-ng file. (CVE-2012-4286)

Buffer overflow in the channelised_fill_sdh_g707_format function in epan/dissectors/packet-erf.c in the ERF dissector in Wireshark 1.8.x before 1.8.2 allows remote attackers to execute arbitrary code via a large speed (aka rate) value. (CVE-2012-4294)

Array index error in the channelised_fill_sdh_g707_format function in epan/dissectors/packet-erf.c in the ERF dissector in Wireshark 1.8.x before 1.8.2 might allow remote attackers to cause a denial of service (application crash) via a crafted speed (aka rate) value. (CVE-2012-4295)

Integer signedness error in the vwr_read_rec_data_ethernet function in wiretap/vwr.c in the Ixia IxVeriWave file parser in Wireshark 1.8.x before 1.8.2 allows user-assisted remote attackers to execute arbitrary code via a crafted packet-trace file that triggers a buffer overflow. (CVE-2012-4298)