整数漏洞研究:安全模型、检测方法和实例  

Research on Integer-Based Vulnerabilities: Security Model, Detecting Methods and RealWorld Cases

作　　者：孙浩[1,2] 曾庆凯[1,2] 

机构地区：[1]计算机软件新技术国家重点实验室(南京大学),江苏南京210023 [2]南京大学计算机科学与技术系,江苏南京210023

出　　处：《软件学报》2015年第2期413-426,共14页Journal of Software

基　　金：国家自然科学基金(61170070;61431008;61321491);国家科技支撑计划(2012BAK26B01)

摘　　要：C/C++语言中整型的有限表示范围、不同符号或长度间的类型转换导致了整数漏洞的发生,包括整数上溢、整数下溢、符号错误和截断错误.攻击者常常间接利用整数漏洞实施诸如恶意代码执行、拒绝服务等攻击行为.综述了整数漏洞的研究进展,从缺陷发生后行为的角度提出了新的整数漏洞安全模型,总结了判定整数漏洞的充分条件.从漏洞判定规则对充分条件覆盖的角度对现有检测方法进行比较和分析.通过实例分析,讨论了整数漏洞在现实中的特征分布.最后指出了整数漏洞研究中存在的挑战和有待进一步研究的问题.In C/C＋＋ language, limited rages represented by integer types and castings between different signs or widths cause integer-based weakness, including integer overflow, integer underflow, signedness error and truncation error. Attackers usually exploit them indirectly to commit damaging acts such as arbitrary code execution and denial of service. This paper presents a survey on integer-based vulnerabilities. A novel security model is proposed in view of behaviors resulting from the weakness occurrence, and the sufficient conditions in determining integer-based vulnerabilities are also presented. A thorough comparison among detecting methods is further conducted in consideration of covering sufficient conditions, Through an empirical study on real-world integer bug cases, the characteristics and distributions are discussed. Finally, the challenges and research directions of integer-based vulnerabilities are explored.

关 键 词：整数漏洞 缺陷发生后行为 安全模型 故意使用 实例研究 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]