Unspecified vulnerability in Avaya IP Softphone 6.0 SP4 and 6.01.85 allows remote attackers to cause a denial of service (crash) via a large amount of H.323 data.
The Avaya IP Office Phone Manager, and other products such as the IP Softphone, stores sensitive data in cleartext in a registry key, which allows local and possibly remote users to steal usernames and passwords and impersonate other users via keys such as Avaya\IP400\Generic.