Off-by-one error in the is_rtsp_request_or_reply function in epan/dissectors/packet-rtsp.c in the RTSP dissector in Wireshark 1.10.x before 1.10.10 and 1.12.x before 1.12.1 allows remote attackers to cause a denial of service (application crash) via a crafted packet that triggers parsing of a token located one position beyond the current position.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.