Blackduck security scanner finds in icu-libs 67.1 ICU4C Vulnerable to Denial-of-Service (DoS) via Memory Management Issues in 'FormattedValueStringBuilderImpl' Class. ICU4C (a C++ implementation of the ICU library) is vulnerable to denial-of-service (DoS) due to memory management issues in certain string manipulation functions. An application that uses ICU4C may crash if the vulnerable functions are triggered during its execution.