BroadWin WebAccess Client with bwocxrun.ocx versions 1.0.0.10 and below suffer from format string and memory corruption vulnerabilities. The OcxSpool function is affected by a format string vulnerability caused by the usage of the Msg string provided by the attacker directly with vsprintf() without the required format argument. WriteTextData and CloseFile allow to corrupt arbitrary zones of the memory through a fully controllable stream identifier in fclose() and fwrite().
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