Multiple stack-based buffer overflows in the SUN RPC service in CA (formerly Computer Associates) BrightStor ARCserve Media Server, as used in BrightStor ARCserve Backup 9.01 through 11.5 SP2, BrightStor Enterprise Backup 10.5, Server Protection Suite 2, and Business Protection Suite 2, allow remote attackers to execute arbitrary code via malformed RPC strings, a different vulnerability than CVE-2006-5171, CVE-2006-5172, and CVE-2007-1785.

The RPC service in mediasvr.exe in CA BrightStor ARCserve Backup 11.5 SP2 build 4237 allows remote attackers to execute arbitrary code via crafted xdrhandlet data in RPC packets, which is used in calculating an address for a function call, as demonstrated using the 191 (0xbf) RPC request.

The RPC Server service (catirpc.exe) in CA (formerly Computer Associates) BrightStor ARCserve Backup 11.5 SP2 and earlier allows remote attackers to cause a denial of service (service crash) via a crafted TADDR2UADDR that triggers a null pointer dereference in catirpc.dll, possibly related to null credentials or verifier fields.