SAP Internet Graphics Service versions - 7.20 7.20EXT 7.53 7.20_EX2 7.81 allows an unauthenticated attacker after retrieving an existing system state value can submit a malicious IGS request over a network which due to insufficient input validation in method CXmlUtility::CheckLength() which will trigger an internal memory corruption error in the system causing the system to crash and rendering it unavailable. In this attack no data in the system can be viewed or modified.