IKEChecker：语法引导的IKE协议有状态模糊测试

郑永辉; 赵栋梁; 顾纯祥; 张协力

doi:10.11959/j.issn.2096-109x.2024057

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IKEChecker：语法引导的IKE协议有状态模糊测试

学术论文

- IKEChecker：语法引导的IKE协议有状态模糊测试
- IKEChecker: grammar-guided stateful fuzzer for IKE protocol implementions
- 网络与信息安全学报 2024年10卷第4期页码：109-122
- 作者机构：
  
  信息工程大学，河南郑州 450001
- 作者简介：
  
  [ "郑永辉（1976- ），男，江西乐平人，信息工程大学副教授、硕士生导师，主要研究方向为密码学。" ]
  [ "赵栋梁（2000- ），男，河北保定人，信息工程大学硕士生，主要研究方向为网络安全协议。" ]
  [ "顾纯祥（1976- ），男，安徽霍山人，信息工程大学教授、博士生导师，主要研究方向为网络安全、密码学。" ]
  [ "张协力（1992- ），男，陕西兴平人，博士，信息工程大学讲师，主要研究方向为网络安全协议。" ]
- 基金信息：
- DOI：10.11959/j.issn.2096-109x.2024057
  中图分类号： TP393
- 收稿：2023-12-28，
  
  修回：2024-07-26，
  
  纸质出版：2024-08-25
- 稿件说明：
移动端阅览
郑永辉, 赵栋梁, 顾纯祥, 等. IKEChecker:语法引导的IKE协议有状态模糊测试[J]. 网络与信息安全学报, 2024, 10(4): 109-122.

Format: ZHENG Y H, ZHAO D L, GU C X, et al. IKEChecker: grammar-guided stateful fuzzer for IKE protocol implementions[J]. Chinese Journal of Network and Information Security, 2024, 10(4): 109-122.
郑永辉, 赵栋梁, 顾纯祥, 等. IKEChecker:语法引导的IKE协议有状态模糊测试[J]. 网络与信息安全学报, 2024, 10(4): 109-122. DOI： 10.11959/j.issn.2096-109x.2024057.

Format: ZHENG Y H, ZHAO D L, GU C X, et al. IKEChecker: grammar-guided stateful fuzzer for IKE protocol implementions[J]. Chinese Journal of Network and Information Security, 2024, 10(4): 109-122. DOI： 10.11959/j.issn.2096-109x.2024057.

摘要

互联网密钥交换（IKE，internet key exchange）协议用于在IPSec（internet protocol security）协议中进行身份验证和密钥协商，其安全性对保护IP通信至关重要，复杂的协议逻辑导致协议实现中难免存在安全漏洞。模糊测试是检测协议实现中潜在漏洞的有效手段，但将现有模糊测试工具直接应用于IKE协议时，存在生成测试用例质量不高、难以探索深层状态空间等局限性。针对上述问题，设计了基于IKE协议语法的变异策略来减少无效测试用例的生成，同时增加测试用例的多样性；引入了基于进化策略的变异调度方案来自动优化变异算子的概率分布，进一步提高生成高质量测试用例的概率；设计了消息处理器用来维护协议交互上下文信息并执行密码学相关的操作，从而支持在黑盒条件下对IKE协议进行测试，并实现对深层协议交互行为和状态空间的探索。基于上述方法实现了IKE协议有状态模糊测试工具IKEChecker，该工具支持对IKEv1和IKEv2协议进行测试。对两种广泛使用的支持IKE协议实现的开源软件strongSwan和Libreswan进行测试，发现4个未公开漏洞；通过与其他模糊测试工具对比，评估了IKEChecker在漏洞检测方面的效率。

Abstract

The internet key exchange (IKE) protocol

integral to the authentication and key negotiation process within the Internet Protocol Security (IPSec) framework

has been utilized for the protection of IP communications. Given the complex protocol logic

security vulnerabilities in the implementation of the IKE protocol are inevitably present. Fuzz testing

recognized as an effective means of detecting potential vulnerabilities in protocol implementations

has been conventionally applied. However

the direct application of existing fuzzing tools to the IKE protocol has been found to present limitations

such as the generation of low-quality test cases and difficulty in exploring deep states. To address these issues

a mutation strategy based on the grammar of the IKE protocol was designed

aiming to reduce the generation of invalid test cases while increasing the diversity of generated test cases. Additionally

an evolutionary strategy-based mutation scheduling scheme was introduced

which automatically optimized the probability distribution of mutation operators

further increasing the likelihood of generating high-quality test cases. A message handler was designed to maintain protocol interaction context information and perform cryptographic operations

thereby supporting testing of the IKE protocol under black-box conditions. This enabled the exploration of deep protocol interaction behavior and state space. Utilizing the aforementioned methods

an IKE protocol stateful fuzz testing tool named IKEChecker was implemented

supporting testing of both IKEv1 and IKEv2 protocols. Testing was conducted on two widely used open-source IKE protocol implementations

strongSwan and Libreswan

resulting in the revelation of 4 undisclosed vulnerabilities. By comparing IKEChecker with other fuzz testing tools

its efficiency in vulnerability detection was evaluated.

关键词

Keywords

references

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