ethereal -- Multiple Protocol Dissector Vulnerabilities

Secunia reports:

Multiple vulnerabilities have been reported in Ethereal, which
can be exploited by malicious people to cause a DoS (Denial of
Service) or compromise a vulnerable system.
The vulnerabilities are caused due to various types of errors
including boundary errors, an off-by-one error, an infinite loop
error, and several unspecified errors in a multitude of protocol
dissectors.
Successful exploitation causes Ethereal to stop responding,
consume a large amount of system resources, crash, or execute
arbitrary code.