Archive | November, 2006

Hacking Tor – A Flaw Appears?

Keep on Guard!


It seems finally someone has found a flaw in the way Tor works, a way to beat it and find out who is using the system.

Perhaps an end to the most anonymous system on the Internet?

I got this info fresh from SANS.

One of our readers sent in a very worrying analysis of what appeared to be “traffic modification” (in his words) on the part of the Tor network.

The Tor (“The Onion Router”) network is an anonymizing peer-to-peer network of routers on the Internet which uses various techniques to bounce traffic around the Internet in such a way that traffic analysis becomes difficult if not impossible to perform. Tor is a perfect example of a dual-use technology: it can be used to avoid government-imposed Internet censorship or to protect the identity of a corporate whistleblower but at the same time it is sadly ideal for various nefarious uses.

It seems to point to traffic modification on an exit node, packetstorm in particular.

The key tenet of Tor is that it should protect anonymity and the reader’s analysis pointed not only to traffic modification on the part of a so-called “exit router” (the last hop in a Tor circuit before your packets reach the real destination) but also an attempt at tracking the true origin of the traffic (in a Tor network a hop only knows that the traffic comes from a previous hop but no futher back).

Both William Salusky and myself looked into the data and it seemed to implicate packetstormsecurity.org, an exit router in Denmark and, more curiously, a DNS tunnel to transmit data out (via obviously fake hosts under the t.packetstormsecurity.org domain). This last item was interesting because it replicated data which was apparently being submitted to the host via an HTTP cookie so it seemed that the idea was to have the cookie travel to the unwitting Tor user and be sent back via DNS tunnel to an external host to confirm the real identity of the host. As both of us were busy we looked a little deeper but ultimately we recommended that the reader report this to the Tor authors.

A quote from the actual paper.

Clearly Tor’s designers have done a pretty good job: I couldn’t find any weakness in Tor itself that violate the tenets set out at http://tor.eff.org/ (basically that end-to-end traffic analysis is always possible, but the traffic analysis should [be] difficult to everything but a global Echelon). So instead, I attacked the data which Tor carries the most of: web traffic.

Worrying indeed, you can download the paper here:

“Practical Onion Hacking” by Andrew Christensen

Source: SANS

Posted in: Networking Hacking, Privacy

Topic: Networking Hacking, Privacy


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the Art of Virology 01h

Keep on Guard!


In this part we will discuss the basic framework of a computer virus… The basics of a virus consists of two elementary procedures (others will tell you three). These are:

  • a search routine
  • a infection routine
  • [anti-detection routines]

The search routine

This routine will have to be a more delicate one [but not hard to analyze at all], because as besides the search routine itself we will include file validation two, we will check within this routine if the file is read-only file, not as in some cases in which I saw that the virus search the file, found it and only when trying to infect it he realised that is read-only, and if no check done for it the virus would crash.


The infection routine

The trivial routine in a virus, because we do not need a search routine if we say for example we make a list of wanted to infect files, this routine (in COM viruses) will only write the whole virus in the host program and write a jump to it at the start of the file… simple don’t you think?

Pseudo-Code Virus

I know it’s the second article and what do you get? only a pseudo-code virus, but be pacient because I’m not so trustful to think that you have already read the book I recommended you in the first part… so wait until the 02h will be out; till then let’s check out our first virus:

If you don’t like it in pseudo-code, maybe you’ll like it in Pascal, so dowload Dirty Nazi Virus Generator (Password: darknet123) and create a virus to analyze… I didn’t try them out but in theory it should work fine… if you don’t have a pascal compiler you can try freepascal


What more do I need to know before actually starting to write viruses?

This is an excellent question because even if the actual search and infect routine are simple to build in assembly, the DTA (Disk Transfer Area) is a little hard to understand so i’ll give you a book which will jump in your help (I advice you to read only the DTA part because the rest of it and even more I’ll treat them myself)…

The Little Black Book Of Computer Viruses

Almost forgot to mention, the password to the archive is Ludwig with the big L.

Another bitter end…

So this second part of the Art of Virology which is a bit easier to diggest than the first one, has finally ended. See you next time and hope that by the next chapter you have learned asm and read about the DTA… till then take five…

Posted in: Virology

Topic: Virology


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Metasploit 2.7 Released – Automated Hacking

Outsmart Malicious Hackers


The Metasploit Framework is an advanced open-source exploit development platform. The 2.7 release includes three user interfaces, 157 exploits and 76 payloads.The Framework will run on any modern operating system that has a working Perl interpreter. The Windows installer includes a slimmed-down version of the Cygwin environment.

Windows users are encouraged to update as soon as possible. A number of improvements were made that should make the Windows experience a little less painful and a lot more reliable. All updates to 2.6 have been rolled into 2.7, along with some new exploits and minor features.

You can download the new metasploit here:

– Unix: http://metasploit.com/tools/framework-2.7.tar.gz
– Win32: http://metasploit.com/tools/framework-2.7.exe

A demonstration of the msfweb interface is running live from:

http://metasploit.com:55555/

This may be the LAST 2.x version of the Metasploit Framework. All development resources are now being applied to version 3.0. More information about version 3.0 can be found online at:

http://metasploit.com/projects/Framework/msf3/

Exploit modules designed for the 2.2 through 2.6 releases should maintain compatibility with 2.7. If you run into any problems using older modules with this release, please let us know.

For more information about the Framework and this release in general, please refer to the online documentation, particularly the User Guide:

http://metasploit.com/projects/Framework/documentation.html

Enjoy!

Posted in: Exploits/Vulnerabilities, Hacking Tools

Topic: Exploits/Vulnerabilities, Hacking Tools


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Oracle MEGA Patch Fixes 101 Security Bugs

Keep on Guard!


Oracle in its very own style recently published a mega patch, it could be called the mother of all patches.

Actually 101 bugs…the scary part is 45 can be exploited remotely.

Oracle published the mother of all security patches containing 101 fixes for flaws in its database, application server, E-Business Suite and PeopleSoft and JD Edwards applications.

Almost half – 45 – of the flaws can be can be exploited by a hacker over a network, while at least six errors in the Oracle database http server can be exploited without the hacker requiring any user name or password. A re-assuring 22 database flaws do at least require some form of authentication.

In total, Oracle’s latest quarterly critical patch update (CPU) features 63 fixes for the database, 14 for its application server, 13 for the E-Business Suite nine for PeopleSoft and JD Edwards and two for Oracle’s Java 2 Enterprise Edition containers on the client. Oracle introduced the quarterly CPU system in November 2004.

This is the latest chapter of a painful security story for Oracle that makes Microsoft, whose software is the internet’s number-one target, appear a community role model.

If it isn’t the size of Oracle’s patches – a January CPU saw a bumper 103 fixes – then it’s their timeliness, or lack of.

Massive eh?

They are known for their lack of speed when it comes to fixing issues.

Red Database Security last year slammed Oracle for taking more than 650 days to fix six problems. And in January this year wNext-Generation Security Software (NGSS), a security research firm, released details of a hole in the Oracle’s Apache web server, saying Oracle was moving too slowly as it had taken 800 days to fix some of the problems in the January CPU.

Recently, Oracle’s response has been to chastise the likes of NGSS, accusing it of endangering users by publishing details of problems. Microsoft, at least, has had the grace to work with security vendors that post details of holes in Windows to the internet, and worked with them to fix the problem.

650 days, that’s almost 2 years. Surely that shouldn’t be tolerated.

Source: The Register

Posted in: Database Hacking, Exploits/Vulnerabilities

Topic: Database Hacking, Exploits/Vulnerabilities


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Vulnerability Assessment and Operational Security Testing Methodology (VAOST) – version 0.2 released

Keep on Guard!


Here is a newly released VA methodology, the author believes it to be more focused, and thus cost effective VA process. It may map to internal work, but it is probably more suited to external sites.

It’s gone through a couple of revisions so it’s a bit more polished now.

You can find the notes on the first version here.

Version 0.2 has been released after some community endorsement, there is still some work to do though, they hope to add the following shortly:

  • Pre stages to get management buy in
  • A complete worked example that shows the kind of results that can be produced
  • A more complete list of or supporting implementing software
  • A more complete list of attack tools for the authorisation checklist.
  • Better graphics
  • A standalone collection of the checklists

You can download VAOST version 0.2 here:

VAOST 0.2 (doc version)

The author welcomes your feedback and comments. The VAOST forum area where you can get the files will accept guest (ie un-registered) posts so you can add your comments there if you desire (note we will delete defamatory and rude posts to prevent our being sued!).

It is work in progress and we still have a long way to go, but hopefully, we can get there with your help.

The general VAOST forum can be found here.

Posted in: Hacking News, Networking Hacking

Topic: Hacking News, Networking Hacking


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