![]() There is a set of vulnerabilities called ‘JavaScript Privilege Escalation’. ADOBE READ CHM MANUALThese functions are called secured functions, marked in the JavaScript API Manual by a red ‘S’ enclosed in a circle. In “privileged” context, the set of API functions that can be called is richer and contains some functions that can be dangerous if not used with great care. ADOBE READ CHM PDFJavaScript within a PDF file is executed under one of two different contexts – “priviledged” and “nonprivileged.”. Adobe’s JavaScript API manual documents most of the usable functions and global variables from such scripts. Such scripts are used to create dynamic content that interacts with the user. It also contains a JavaScript engine that renders scripts embedded within a document. It allows you to render text, pictures, and even 3D objects. In this blog post, I will provide a technical walkthrough of these vulnerabilities, how they can be exploited, and how Palo Alto Networks customers are protected. These vulnerabilities could allow an attacker to compromise Adobe Reader by bypassing restrictions on JavaScript API execution (CVE-2016-6957) and security provisions that prevent arbitrary execution of scripts such as those written in Python (CVE-2016-6957). ADOBE READ CHM PATCHAdobe has since released a patch (on October 6, 2016) to fix these vulnerabilities, which are named CVE-2016-6957 and CVE-2016-6958. Some anti-monopolism people will kill me for saying this but I think there is a reason most online versions of magazines are in PDF (sure, you could say it's the monopoly of Adobe and bla bla yadda yadda, but conspiracy theories aside.) since it's SO much better format for making great stuff, lots of tools and things that can be done.ĬHM as far as I know can only do what static HTML does (unless I missed a big memo from the internet), so that's pretty restricted.We recently discovered two zero-day vulnerabilities in Adobe Reader. My advice would be to get something similar to check your existent CHMs (the app says it can highlight for instance), but then If possible get the stuff you need on PDF. I just saw CHMAte on the Store, there is even a light version. I'm out of credit now, so I'll buy it next month but I've heard and seen good things about it. PDF Expert is an example of an iPad app that annotates. So yeah, CHM is cool but it was out-phased (in my opinion) by PDF now. Plus it was never really super cross-platform friendly (I remember having to do tricks to read it on Linux distros). There are tons of ways to annotate on a (non encrypted) PDF and it's likely gonna be though to find a CHM reader for say, iOS and the like. I think I used to love it because I could just grab stuff and read offline (back in the time when computers where slow, phones were NOT smart, internet was expensive and PDF was a pain in the butt to render).īut the PDF format (along with ePub and others) stands as THE thing nowadays.Īnnotation? Forget CHM, it's barebones and static. Think of it as an HTML website with links to the left. ![]() ![]() ![]() There are a lot of Windows applications that would use CHM as the help format of choice. It was THE thing back in the day (I even downloaded some CHM makers and made some stuff myself). It's basically and OLD HTML-based format. I could stand corrected in the future, but CHM was made by Microsoft. ![]()
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