The Administration Service (FMSAdmin.exe) in Macromedia Flash Media Server 2.0 r1145 allows remote attackers to cause a denial of service (application crash) via a malformed request with a single character to port 1111.
Macromedia Breeze Communication Server and Breeze Live Server does 5.1 and earlier not sufficiently validate certain RTMP data, which allows attackers to cause a denial of service (instability or crash), as demonstrated using an alpha release build of Flash Player 8.5 (build 133).