ethereal -- multiple vulnerabilities

An Ethreal Security Advisories reports:

Issues have been discovered in the following protocol
dissectors:

Matthew Bing discovered a bug in DICOM dissection that
could make Ethereal crash.
An invalid RTP timestamp could make Ethereal hang and
create a large temporary file, possibly filling
available disk space.
The HTTP dissector could access previously-freed
memory, causing a crash.
Brian Caswell discovered that an improperly formatted
SMB packet could make Ethereal hang, maximizing CPU
utilization.

Impact: It may be possible to make Ethereal crash or run
arbitrary code by injecting a purposefully malformed
packet onto the wire or by convincing someone to read a
malformed packet trace file.