Fuzzing method based on field filter and packet repair for GTPv2 protocol

Abstract 4G communication technology plays an important role in the information transmission of the Internet of Things(IoT). Focusing on the security of 4G is of great significance to the security of IoT. Since the GTPv2 protocol is a very important protocol in the 4G core network, this paper mainly fuzzed the GTPv2 protocol. Aiming at the shortcomings of traditional protocol fuzzing technology, such as time-consuming and low coverage, this paper proposes a novel fuzzing technique based on field filter and packet repair to address those problems. By analyzing the test results, we found that the application of the new algorithm made the fuzzing technology greatly improved in terms of time consumption and coverage and found additional security vulnerabilities. The new algorithm proposed in this paper can also be used for most other protocols in IoT.