Multiple buffer overflows in xdr functions in the server in CA BrightStor ARCServe Backup 11.0, 11.1, and 11.5 allow remote attackers to execute arbitrary code, as demonstrated by a stack-based buffer overflow via a long parameter to the xdr_rwsstring function.
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.