The dissect_sip_p_charging_func_addresses function in epan/dissectors/packet-sip.c in the SIP dissector in Wireshark 1.6.x before 1.6.13 and 1.8.x before 1.8.5 does not properly handle offset data associated with a quoted string, which allows remote attackers to cause a denial of service (infinite loop) via a malformed packet.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.