Client side attacks are heavily used in red team engagements as they can allow the red team to execute arbitrary code or retrieve password hashes. Usually Microsoft office products are used to perform these kind of attacks however PDF documents can be also utilized for obtaining NTLM hashes of users without triggering any alerts. As with similar others attacks when the user will open the file an authentication attempt to that path will happen on the background with the current users credentials. An attacker who monitors the traffic can capture the NTLM hash.
Export Injection – A new server side vulnerability
books/Mastering Modern Web Penetration udimonteverde.org at master · thecyberhex/books · GitHub
A penetration test, also known as a pen test, is a simulated cyber attack against your computer system to check for exploitable vulnerabilities. In the context of web application security, penetration testing is commonly used to augment a web application firewall WAF. Pen testing can involve the attempted breaching of any number of application systems, e. Insights provided by the penetration test can be used to fine-tune your WAF security policies and patch detected vulnerabilities. Scanning The next step is to understand how the target application will respond to various intrusion attempts.
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This article will talk about a new server side vulnerability that I discovered in the PDF export process. Many servers are still vulnerable, varying from social networks to financial and governmental websites. As a penetration tester, I have tested a lot of large web applications that included the conversion feature, and was wondering — what happens behind the scenes, does this process broaden the attack surface? After a quick research, I discovered that the process is very dangerous from a security perspective, and without the appropriate filtering, could expose your application to many vulnerabilities. In this article, I will try to explain the conversion process, and the potential attacks.
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