Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and
(2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of
service (heap corruption and application crash) or possibly execute
arbitrary code via a large length value in a message, related to the
(a) ClientConnection::CheckBufferSize and (b)
ClientConnection::CheckFileZipBufferSize functions in
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