Detect and Sanitise Encoded Cross-Site Scripting and SQL Injection Attack Strings Using a Hash Map

Cross-Site Scripting (XSS) and SQL injection are the top vulnerabilities found in web applications. Attacks to these vulnerabilities could have been minimised through placing a good filter before the web application processes the malicious strings. However adversaries could craft variations on the attack strings in such a way that they do not get filtered. Checking through all of the possible attack strings was tedious and causes the web application performance to degrade. In this paper, we propose the use of a hash map as a data structure to address the issue. We implemented a proof-of-concept filter which we tested through an open-source web application to show that such filter could sanitise some attack strings that otherwise were too tedious to detect. Our evaluation included comparing the proposed solution with other existing ones such as prepared statements, input length limitation, white list and black list input validation; our proposed solution performed the most efficient

Security vulnerabilities related to web-based data

In this digital era, organizations and industries are moving towards replacing websites with web applications for many obvious reasons. With this transition towards web-based applications, organizations and industries find themselves surrounded by several threats and vulnerabilities. One of the largest concerns is keeping their infrastructure safe from attacks and misuse. Web security entails applying a set of procedures and practices, by applying several security principles at various layers to protect web servers, web users, and their surrounding environment. In this paper, we will discuss several attacks that may affect web-based applications namely: SQL injection attacks, cookie poisoning, cross-site scripting, and buffer overflow. Additionally, we will discuss detection and prevention methods from such attacks

Implementation Ids for Web Security Mechanism against Injection and Multiple Attacks

In this paper we propose a philosophy and a model apparatus to assess web application security instruments. The approach is in view of the thought that infusing sensible Vulnerabilities in a web application and assaulting them naturally can be utilized to bolster the evaluation of existing security systems and apparatuses in custom setup situations. The investigations incorporate the assessment of scope and bogus positives of an interruption recognition framework for SQL Injection assaults and the viability's evaluation of two top business web application defenselessness scanners. Results demonstrate that the infusion of vulnerabilities and assaults is to be sure a viable approach to assess security components and to bring up their shortcomings as well as courses for their change

The approaches to quantify web application security scanners quality: A review

The web application security scanner is a computer program that assessed web application security with penetration testing technique. The benefit of automated web application penetration testing is huge, which web application security scanner not only reduced the time, cost, and resource required for web application penetration testing but also eliminate test engineer reliance on human knowledge. Nevertheless, web application security scanners are possessing weaknesses of low test coverage, and the scanners are generating inaccurate test results. Consequently, experimentations are frequently held to quantitatively quantify web application security scanner's quality to investigate the web application security scanner's strengths and limitations. However, there is a discovery that neither a standard methodology nor criterion is available for quantifying the web application security scanner's quality. Hence, in this paper systematic review is conducted and analysed the methodology and criterion used for quantifying web application security scanners' quality. In this survey, the experiment methodologies and criterions that had been used to quantify web application security scanner's quality is classified and review using the preferred reporting items for systematic reviews and meta-analyses (PRISMA) protocol. The objectives are to provide practitioners with the understanding of methodologies and criterions that available for measuring web application security scanners' test coverage, attack coverage, and vulnerability detection rate, while provides the critical hint for development of the next testing framework, model, methodology, or criterions, to measure web application security scanner quality

Block-scoped access restriction technique for HTML content in web browsers

Web sites, web browsers, web site authors, web component authors, and end users interact in a complicated environment with many recognized and unrecognized trust relationships. The web browser is the arena in which many important trust relationships interact, thus it bears a considerable burden in protecting the interests and security of web end users as well as web site authors. Existing proposals, draft standards, implemented features, and web application techniques go a long way towards allowing rich and compelling content interactions, but they do not provide for rich, mutually-distrusting content to be safely embedded in a single page. This proposal suggests a declarative policy mechanism that permits untrusted content to be safely embedded in a web site while still retaining some richness. It also suggests a policy integration approach to allow multiple cooperative (but not necessarily trusting) parties to provide components of a policy that combine together in a safe manner. It incorporates techniques including fine-grained and coarse-grained permission dropping and white-listing protections for retained capabilities. Finally, the proposed concepts are applied to a number of real-world CVE vulnerabilities, and it is explained how the proposal does or does not prevent or mitigate the attack. The solution is shown to be effective against cross-style-scripting style attacks, and to not be effective at preventing incoming cross-site request forgery attacks

Nástroj pro penetrační testování webových aplikací

Abstract As hackers become more skilled and sophisticated and with cyber-attacks becoming the norm, it is more important than ever before to undertake regular vulnerability scans and penetration testing to identify vulnerabilities and ensure on a regular basis that the cyber controls are working. In this thesis the importance and working of penetration testing and web application based penetration testing are discussed, followed by comparison and information’s about various testing tools and techniques and their advantages and disadvantages. The next section of the thesis mainly focuses on the past, current and future state of penetration testing in the computer systems and application security, importance of General Data Protection Regulation (GDPR) and Content Management system (CMS) followed by the main goal of the thesis which explains the existing solutions in automated tools for vulnerability detection of web application their techniques, positive and negative results of the conducted tests and their merits and demerits. In the next section, based on the comparison of various existing tools selecting appropriate algorithm for discussing the importance of scanning the ports which are usually focused in very few existing web application tools, the following section practically demonstrate the scanning of ports which gives information regarding, the state of ports to understand the service information running on the server. Finally the result of the experiment will be compared with the existing web application tools.Abstraktní Vzhledem k tomu, že se hackeři stávají zkušenějšími a sofistikovanějšími a kybernetické útoky se stávají normou, je důležitější než kdy jindy provádět pravidelné kontroly zranitelnosti a penetrační testování, aby bylo možné identifikovat zranitelná místa a pravidelně zajišťovat fungování kybernetických kontrol. V této práci je diskutován význam a fungování penetračního testování a penetračního testování založeného na webových aplikacích, následuje srovnání a informace o různých testovacích nástrojích a technikách a jejich výhodách a nevýhodách. Další část práce se zaměřuje především na minulý, současný a budoucí stav penetračního testování v počítačových systémech a zabezpečení aplikací, význam nařízení o obecné ochraně údajů (GDPR) a redakčního systému (CMS) následovaného hlavním cílem práce, která vysvětluje stávající řešení v automatizovaných nástrojích pro zjišťování zranitelnosti webové aplikace, jejich techniky, pozitivní a negativní výsledky provedených testů a jejich přednosti a nedostatky. V další části, založené na srovnání různých existujících nástrojů, které vybírají vhodný algoritmus pro diskusi o důležitosti skenování portů, které jsou obvykle zaměřeny na velmi málo stávajících webových aplikací, následující část prakticky demonstruje skenování portů, které poskytují informace týkající se, stav portů pro pochopení informací o službě běžících na serveru. Nakonec bude výsledek experimentu porovnán s existujícími nástroji webové aplikace.460 - Katedra informatikyvelmi dobř

An empirical comparison of commercial and open‐source web vulnerability scanners

Web vulnerability scanners (WVSs) are tools that can detect security vulnerabilities in web services. Although both commercial and open-source WVSs exist, their vulnerability detection capability and performance vary. In this article, we report on a comparative study to determine the vulnerability detection capabilities of eight WVSs (both open and commercial) using two vulnerable web applications: WebGoat and Damn vulnerable web application. The eight WVSs studied were: Acunetix; HP WebInspect; IBM AppScan; OWASP ZAP; Skipfish; Arachni; Vega; and Iron WASP. The performance was evaluated using multiple evaluation metrics: precision; recall; Youden index; OWASP web benchmark evaluation; and the web application security scanner evaluation criteria. The experimental results show that, while the commercial scanners are effective in detecting security vulnerabilities, some open-source scanners (such as ZAP and Skipfish) can also be effective. In summary, this study recommends improving the vulnerability detection capabilities of both the open-source and commercial scanners to enhance code coverage and the detection rate, and to reduce the number of false-positives