• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.441-444
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• 2014

인터넷의 보급에 따른 신속정확하고 편리한 정보처리의 장점에도 불구하고 최근 들어 급증하고 있는 보안 관련 사고들로 인하여 개인정보 및 기업정보의 관리에 대한 대책 마련이 시급한 가운데 있다. 그 중에서도 SQL 삽입 공격에 의한 악의적인 관리자 권한 획득 및 비정상적인 로그인 등으로 인하여 많은 피해가 발생하고 있다. 현재 SQL Injection에 관련된 대부분의 연구는 공격을 탐지하는 방법에 초점이 맞추어져 있다. 본 논문에서는 프로그램 코드를 분석하여 따옴표가 포함된 취약한 인라인 SQL 쿼리 구문을 찾아서 매개변수화된 쿼리로 변경하는 기능을 제공함으로써 근본적인 해결책을 찾고자 하였으며 Java, C#.net 등 다양한 언어를 지원하여 개발 업무에서의 활용성을 높이고자 하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.303-306
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• 2010

Personal information being leaked, and personal assets that through a malicious web site for hackers to exploit. Other confidential information via the web site of the country, and your personal information by illegally accessing the data has been obtained who Hacker forces are operating in some countries. Due to the problem of web site management has many vulnerabilities that web sites, as well as programs. In this paper, in the trend world, as well as domestic XSS, SQL Injection, Web Shell analysis of the vulnerability to attacks and XSS, SQL Injection, Web Shell is a direct attack to attack. Security measures are presented what after the attack demonstrated the hack to data collection, analysis. In this study, web site management, web site security and safety can be improved and research will contribute.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.07a
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• pp.77-78
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• 2015

본 논문에서는 S/W 개발 보안 지침의 사례로서 SQL 삽입에 대하여 설명한다. SQL 삽입은 입력 데이터 검증 및 표현에서 S/W 취약점 유형의 하나이다. 본 논문에서는 SQL 삽입에서 취약점 설명, 취약점 개념도, 보안 대책, 그리고 코드 예제까지 설명하도록 한다.

• The KIPS Transactions:PartA
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• v.15A no.3
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• pp.181-188
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• 2008

Nowadays, most web sites are developed using dynamic web pages where web pages are generated and transmitted by web application programs. Therefore, the ratio of attacks injecting malevolent strings to vulnerable web applications is increasing. In this paper, we present a static program analyzer which analyzes whether a web application program has vulnerabilities to the SQL injection attack and the cross site scripting(XSS) attack. To analyze programs using abstract interpretation framework, we designed an abstract domain which models potential string set along with excluded strings and developed an abstract interpreter for the PHP language. Also, based on them, we implemented a static analyzer. According to our experiments, our analyzer has competitive analysis speed and accuracy compared with related research results.

• Journal of the Korea Convergence Society
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• v.6 no.4
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• pp.225-234
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• 2015

With the growing number of people that use web services, the perception of the importance of securing web applications is also increasing. There are many different types of attacks that target web applications. In the rapidly-changing knowledge and information society, which came into being with the advancements made in information and communication technology, there is currently an urgent need for building web sites for the purposes of developing one's creativity and character. In this paper, attack schemes that use SQL injections and XSS and target educational digital curation systems which provide educational contents with the aim of developing of one's creativity and character are analyze, in terms of how the attacks are carried out and their vulnerabilities. Furthermore, it suggests ways of dealing appropriately with these web-based attacks that use SQL injections and XSS.

• Convergence Security Journal
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• v.8 no.4
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• pp.173-181
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• 2008

Recently, Worm epidemic models have been developed in response to the cyber threats posed by worms in order to analyze their propagation and predict their spread. Some of the most important ones involve mathematical model techniques such as Epidemic(SI), KM (Kermack-MeKendrick), Two-Factor and AAWP(Analytical Active Worm Propagation). However, most models have several inherent limitations. For instance, they target worms that employ random scanning in the network such as CodeRed worm and it was able to be applied to the specified threats. Therefore, we propose the probabilistic of worm propagation based on the Markov Chain, which can be applied to cyber threats such as Mass SQL Injection worm. Using the proposed method in this paper, we can predict the occurrence probability and occurrence frequency for each threats in the entire system.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10d
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• pp.82-85
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• 2007

본 논문은 웹을 이용한 보안 취약점 점검 도구를 개발한다. 본 논문은 보안 취약점 점검 도구들을 이용하여 웹 상에서 사용자의 컴퓨터 시스템에 대한 점검을 통해서 결과를 보여주는 환경을 개발한다. 개발된 웹 보안 취약점 점검 도구는 쉽게 자신의 서버 컴퓨터의 취약점을 점검할 수 있다. 본 논문에서 구현된 보안 취약점 점검 도구의 기능은 포트 스캔, SQL injection 취약점 점검 기능으로 구성되어 있다. 포트 스캔 취약점 점검 도구의 기능은 열려져 있는 컴퓨터 시스템의 포트 점검을 통하여 불필요하게 열려져 있는 포트를 점검한다. 이런 점검을 통해서 보안 취약점을 사전에 차단한다. SQL injection 기능은 DB에서 SQL 구문의 취약점을 점검한다. 본 논문에서 제안하는 보안 취약점 점검 기능에 대해서 실험을 수행하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.457-461
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• 2017

Barcode is widely being used in many places such as supermarket, cafeteria, library, etc. ISBN, Code 128, Code 39 are mainly used in barcode. Among them, Code 128 which is based on ASCII Code can transfer control letters that range from ASCII Code 0 to ASCII 32. Control letters intrinsically imply letters that are used to deliver information to peripheral devices such as a printer or communication joint, however, they play quite different roles if they are inputted on Windows. Generally, barcode devices doesn't verify input data, thus it enables people to tag any barcode that has specific control letters and execute the commands. Besides, most barcode recognition programs are using a database and they have more security weakness compared to other programs. On the basis of those reasons, I give an opinion that SQL Injection can attack barcode recognition programs through this study.

• Journal of Information Processing Systems
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• v.6 no.4
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• pp.563-574
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• 2010

The growing number of web applications in the global economy has made it critically important to develop secure and reliable software to support the economy's increasing dependence on web-based systems. We propose an intercepting filter approach to mitigate the risk of injection flaw exploitation- one of the most dangerous methods of attacking web applications. The proposed approach can be implemented in Java or .NET environments following the intercepting filter design pattern. This paper provides examples to illustrate the proposed approach.

• International Journal of Internet, Broadcasting and Communication
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• v.15 no.3
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• pp.149-159
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• 2023

Web application security education that can provide practical experience is needed to reduce damage caused by the recent increase in web application vulnerabilities and to strengthen security. In this paper, we proposed a scenario-based web application education method, applied the proposed method to classes, and analyzed the results. In order to increase the effectiveness of scenario-based education, a real-life practice environment to perform scenarios and instructions to be performed by learners are needed. As an example of the proposed method, instructions to be performed by learners from the viewpoint of the attacker and the victim were shown in a practice environment to teach XSS and SQL injection vulnerabilities. After applying the proposed method to the class for students majoring in cyber security, when the lecture evaluation results were analyzed, it was shown that the learner's interest, understanding, and major ability all improved.