Introduction The Content Security Policy (CSP) is a security mechanism web applications can use to reduce the risk of attacks based on XSS, code injection or clickjacking. Using different directives it is possible to lock down web applications by implementing a whitelist of trusted sources from which web resources like JavaScript may be loaded. Currently […]
Compass Security invested quite some time last year in researching the security of single sign-on (SSO) implementations. Often SAML (Security Assertion Markup Language) is used to implement a cross-domain SSO solution. The correct implementation and configuration is crucial for a secure authentication solution. As discussed in earlier blog articles, Compass Security identified vulnerabilities in SAML […]
Websites nowadays are mostly built with different resources from other origins. For example, many sites include scripts or stylesheets like jQuery or Bootstrap from a Content Delivery Network (CDN). This induces that the webmasters implicitly trust the linked external sources. But what if an attacker can force the user to load the content from an […]
As in past years, Compass Security will participate in the upcoming CyberSec Conference in Yverdon-les-Bains (formerly Application Security Forum – Western Switzerland). This year, we will contribute in two events: First, Antoine Neuenschwander and Alexandre Herzog will conduct a day long training session on Tuesday, November 3rd. Participants will be able to exercise their skills […]
During a SharePoint 2013 penetration test I performed last November, I noticed that a dynamically constructed JavaScript constantly fetched content or redirected me to the requested pages. Using a variation of the double-slash trick we exploited in the past, I misused this functionality in order to perform a DOM based open redirection attack. Every SharePoint […]
At our reoccurring Hacklab days, we at Compass get the chance to hack some stuff of our own choice together for a day. For example playing with GSM in an attempt to send fake SMS or eavesdrop on voice data, comparing Encase capabilities to Unix command line forensic tools or cloning door entry badges in […]
Nowadays, a growing list of XSLT processors exist with the purpose of transforming XML documents to other formats such as PDF, HTML or SVG. To this end such processors typically offer a powerful set of functionalities – which, from a security point of view, can potentially pose severe risks. Within this post, we highlight some […]
Web Application Security Training Die Compass Security hat im Moment im Bereich Web Security zwei Kurse ausgeschrieben. Ein Basic und ein Advanced. Unsere öffentlichen Kurse dauern jeweils 2-Tage und bestehen zur Hälfte aus praktischen Beispielen (Hands-On Lab) und zur anderen Hälfte aus Theorie. Wobei die Doing-Aufgaben in der Regel eine Schritt-für-Schritt Anleitung sind. Der Hacker-Angriff […]
On the last Saturday the 22nd of November, I attended BSidesVienna 2014 to deliver a talk about BurpSentinel. This tool is a Burp Suite extension giving better control over semi-automated requests sent to a given web application page. The presentation also covered aspects on automated Cross-Site Scripting and SQL injection detection. Despite talking early in the day (10 am), […]
Nowadays, we all relentlessly use search engines and developers extensively use version and source code control systems to keep track of their source code. Services such as Google or GitHub are great to search and retrieve information they gathered and stored. But when it comes to public indexing services, one big problem raises up: your whole […]
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