The dissect_version_5_and_6_primary_header function in epan/dissectors/packet-dtn.c in the DTN dissector in Wireshark 1.6.x before 1.6.13 and 1.8.x before 1.8.5 accesses an inappropriate pointer, which allows remote attackers to cause a denial of service (application crash) via a malformed packet.

Double free vulnerability in epan/proto.c in the dissection engine in Wireshark 1.6.x before 1.6.13 and 1.8.x before 1.8.5 allows remote attackers to cause a denial of service (application crash) via a malformed packet.

The fragment_set_tot_len function in epan/reassemble.c in Wireshark 1.6.x before 1.6.13 and 1.8.x before 1.8.5 does not properly determine the length of a reassembled packet for the DTLS dissector, which allows remote attackers to cause a denial of service (application crash) via a malformed packet.

The dissect_sdp_media_attribute function in epan/dissectors/packet-sdp.c in the SDP dissector in Wireshark 1.6.x before 1.6.13 and 1.8.x before 1.8.5 does not properly process crypto-suite parameters, which allows remote attackers to cause a denial of service (infinite loop) via a malformed packet.

The dissect_wtp_common function in epan/dissectors/packet-wtp.c in the WTP dissector in Wireshark 1.6.x before 1.6.12 and 1.8.x before 1.8.4 uses an incorrect data type for a certain length field, which allows remote attackers to cause a denial of service (integer overflow and infinite loop) via a crafted value in a packet.

The dissect_eigrp_metric_comm function in epan/dissectors/packet-eigrp.c in the EIGRP dissector in Wireshark 1.8.x before 1.8.4 uses the wrong data type for a certain offset value, which allows remote attackers to cause a denial of service (integer overflow and infinite loop) via a malformed packet.

The dissect_sflow_245_address_type function in epan/dissectors/packet-sflow.c in the sFlow dissector in Wireshark 1.8.x before 1.8.4 does not properly handle length calculations for an invalid IP address type, which allows remote attackers to cause a denial of service (infinite loop) via a packet that is neither IPv4 nor IPv6.

epan/dissectors/packet-3g-a11.c in the 3GPP2 A11 dissector in Wireshark 1.8.x before 1.8.4 allows remote attackers to cause a denial of service (infinite loop) via a zero value in a sub-type length field.

epan/dissectors/packet-usb.c in the USB dissector in Wireshark 1.6.x before 1.6.12 and 1.8.x before 1.8.4 relies on a length field to calculate an offset value, which allows remote attackers to cause a denial of service (infinite loop) via a zero value for this field.

Wireshark 1.8.x before 1.8.4 allows remote attackers to obtain sensitive hostname information by reading pcap-ng files.