Severe Security Hole in Apple Mac Safari Web Browser

Outsmart Malicious Hackers


As the German IT portal heise online conveys, a new security hole in the Safari webbrowser for Apple’s Mac OS X has been discovered. This security hole is rather severe, as it invokes the execution of shell scripts under certain circumstances.

Once again the Safari option “open safe” files automatically after download bears the blame. If this facility runs across a shell script that is missing the so-called Shebang-row, the system won’t ask the user whether to execute the file automatically anymore – it’ll just execute it anyways. Unfortunately you can simply rename a shellscript without a Shebang-row to known-good filetype extensions like JPG or PNG and put that renamed script into a ZIP file – zipping as well an administrative file that’ll connect that file with the shell. A target Mac then “knows” automatically how to open that file if it receives that ZIP – it’ll take it as totally normal to execute the “jpg file” with the shell.

To circumvent this issue immediately, you can exercise two countermeasures – the first one is to disable that unsafe option in Safari, the second one is to move the terminal to another place, as the connection between shellscript and terminal has a hardcoded file path to the terminal. Additionally, you should never ever work with administrator privileges – as one should be used to with windoze, this rule of thumb has the same virtues on a Mac as well

Source: 4null4.de

A rare exploit for Mac eh, it is possible to exploit, it’s not just a theory, you can find a proof of concept here:

http://www.mathematik.uni-ulm.de/numerik/staff/lehn/macosx.html

With a Babelfish Translation.

Posted in: Apple, Web Hacking

, , , , ,


Latest Posts:


BootStomp - Find Bootloader Vulnerabilities BootStomp – Find Android Bootloader Vulnerabilities
BootStomp is a Python-based tool, with Docker support that helps you find two different classes of bootloader vulnerabilities and bugs.
Google Chrome Marking ALL Non-HTTPS Sites Insecure July 2018 Google Chrome Marking ALL Non-HTTPS Sites Insecure July 2018
Google is ramping up its campaign against HTTP only sites and is going to mark ALL Non-HTTPS sites insecure in July 2018 with the release of Chrome 68.
altdns - Subdomain Recon Tool With Permutation Generation altdns – Subdomain Recon Tool With Permutation Generation
Altdns is a subdomain recon tool in Python that allows for the discovery of subdomains that conform to patterns. The tool takes in words that could be present in subdomains under a domain (such as test, dev, staging) as well as takes in a list of subdomains that you know of.
0-Day Flash Vulnerability Exploited In The Wild 0-Day Flash Vulnerability Exploited In The Wild
So another 0-Day Flash Vulnerability is being exploited in the Wild, a previously unknown flaw which has been labelled CVE-2018-4878 and it affects 28.0.0.137 and earlier versions
dorkbot - Command-Line Tool For Google Dorking dorkbot – Command-Line Tool For Google Dorking
dorkbot is a modular command-line tool for Google dorking, which is performing vulnerability scans against a set of web pages returned by Google search queries in a given Google Custom Search Engine.
USBPcap - USB Packet Capture For Windows USBPcap – USB Packet Capture For Windows
USBPcap is an open-source USB Packet Capture tool for Windows that can be used together with Wireshark in order to analyse USB traffic without using a Virtual Machine.


Comments are closed.