RealNetworks RealPlayer 11.0 through 11.1 and 14.0.0 through 14.0.5, RealPlayer SP 1.0 through 1.1.5, RealPlayer Enterprise 2.0 through 2.1.5, and Mac RealPlayer 12.0.0.1569 do not properly handle DEFINEFONT fields in SWF files, which allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted file.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.