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Posts tagged ‘Windows’

15
May

Honeyport Python Script with Local Firewall and Dome9 Support

Icon-PythonFollowing on from my linux bash honeyport script (read this first if you don’t know what a Honeyport is), I wanted to write a script that works across platforms to accept connections on a given port and block that IP using the local firewall – IPFW on Mac OS X, iptables on Linux, or Windows Firewall – or using the Dome9 service (I’m hoping to add Unix support soon).

I chose to write this one in Python as the cross-platform language of choice, and it’s compatible with Python 2.7 to 3.4. One feature of this script is that you can optionally configure it to run another Python script whenever a client connects to the honeyport. The client’s IP will be passed to the called script as an argument, allowing you to do whatever you want with it. The script’s output is then sent back to the connected client before they are blacklisted.

Check it out on GitHub, improvements and additional ideas are welcome!

21
Aug

Linux Bash Ncat Honeyport Script with IPTables and Dome9 Support

After securing systems by hiding them completely from the network/internet using Single Packet Authorization, I’ve recently been interested in doing more so-called ‘active’ defense, by implementing solutions to delay, confuse, or thwart attackers. Completely hiding one’s system is not always feasible (ie. in the case of an internet-facing server), and monitoring, apart from being purely reactive, is not always easy and requires the involvement of a human. An alternative to these is to do some automated active defense. One simple tool in the bag of active defense tricks is the honeyport. Read moreRead more

13
Oct

Apple Releases Slew of Security Updates (OSX, Safari, iTunes, iOS 5, aTV)

I wasn’t going to post about last week’s fairly significant iTunes update, but then Apple went and patched a whole bunch of vulnerabilities across the board. Some of these are fairly significant so I thought I would provide a short breakdown of the changes. Either way, you should definitely be patching all of your Apple devices and software tonight.

Hit the jump for a summary of the key vulnerabilities patched in Apple’s security updates.

Read moreRead more

10
Mar

Safari Errorjacking Vulnerability and Exploit [Patched]

One of the vulnerabilities patched in Safari 5.0.4 is a fairly critical issue in WebKit (CVE-2011-0167) that allows Javascript to jump into the local zone, and access any file on the local computer that is accessible to the current user. This could be used by malicious websites to extract files and information from the victim’s computer. The vulnerability affects Safari on Mac OS X and Windows, and could affect other WebKit-based browsers, although Chrome is safe due to added restrictions.

The bug exists because most browser error pages are loaded from the local “file:” zone, a zone that Javascript is not normally allowed to access directly. Since a child browser window remains under the control of the parent, it is possible to cause a child browser window to error, thus entering the normally-restricted local zone, and then instructing the child window to access local files using this elevated local-zone privilege.

This issue was a nice catch, discovered by Aaron Sigel who has a detailed explanation, video demo and proof-of-concept on his blog. It probably goes without saying, but Safari users should run Software Update as soon as possible.

4
Feb

Single Packet Authorization with simpleSPA

I was just made aware of simpleSPA, a recently-released Java implementation of Single Packet Authorization by Chris Chrysler. The package provides a Linux-only server-side daemon, and a Linux and Windows client. Although I haven’t testing it yet, I assume the client will also work on Mac OS X. This implementation requires a Linux server as it relies on iptables being the firewall. simpleSPA uses two RSA keys in order to encrypt the authentication information. The first key encrypts the username of the user requesting access, while the second key is used to encrypt a pre-shared key and a timestamp (for freshness). The resulting authorization packet is then sent via UDP to the server. Although a timestamp is used, there doesn’t appear to be an explicit check for previously-received packets (ie. using a hash), so there may be some for time-limited replay attacks. Because RSA and public-keys are used, it’s a shame to see that it doesn’t use digital signatures to protect the payload.

simpleSPA does not allow for dynamic configuration of the firewall. As such, upon receiving a valid authorization packet (using Jpcap to sniff the wire), the server looks at a pre-defined config file that defines the firewall port(s) to be opened for the requesting user. Furthermore the port is opened for the IP that made the request, thus not allowing the client to embed an IP within the request and open a port out-of-band. The author states that this implementation is primarily an academic proof-of-concept at this point, and so is nowhere near as complete as other implementations such as fwknop (Perl/C) and Aldaba (C). It is nice, however, to see continued research and development into SPA as well as a Java implementation!

8
Dec

Apple Releases QuickTime 7.6.9 Security Update

Apple has released QuickTime 7.6.9 for Leopard 10.5.8 and Windows (XP,V,7), patching a number of vulnerabilities including several that were fixed in the recent 10.6.5 update.

The vulnerabilities include improper handling of JP2, AVI, MPEG, Flashpix, GIF, PICT, and QTVR files. Viewing maliciously-crafted files can lead to remote code execution in some cases.

QuickTime definitely needs more strengthening. Leopard and Windows users, go forth and patch!

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1
Dec

Creating a Secure Mac/PC Portable USB Drive

Ever since the release of the IronKey I’ve been drooling over the device (good thing it’s waterproof I guess). Due to not wanting to pay so much for a USB key, I decided to make my own. I grabbed myself a 32GB USB key, and got to work on making it as close to the IronKey as possible.

In this article I’m going to illustrate some of the things you can do to secure the information on your portable thumb drive, increase your privacy, and even install Mac OS X or Linux.
19
Nov

Apple Releases Safari 5.0.3 and 4.1.3

Safari updates 5.0.3 and 4.1.3 (for both Mac OS X and Windows) have been released to patch a number of WebKit vulnerabilities, some of which can lead to arbitrary remote code execution.

Fire up your Software Update! Hit the jump for full details of the vulnerabilities fixed.

Read moreRead more

15
Oct

limera1n Jailbreak for Mac OS X and Windows

The limera1n jailbreak is now available for both Mac OS X and Windows. It currently supports the following devices:

  • iPhone 3GS
  • iPod Touch 3G
  • iPad
  • iPhone 4
  • iPod Touch 4G

Download it here.

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