23 Feb 2010 von Alexander Kornbrust.

The latest version 3.0 of our database scanner Repscan is now available. This new version supports MS SQL Server and Oracle databases. Repscan comes with a large amount of new features and a complete new GUI (First database scanner with Office-2007 UI).

Here some of the new features of Repscan 3.0:

• Support for MS SQL Server (2000, 2005, 2008)
• Extremely user-friendly database configuration wizard (screenshot)
• Flexible tree control (re-group databases by status, hierarchy, …) (screenshot)
• Database security browser with drill down functionality (PDF, XLS, … export) (screenshot, screenshot)
• New reports (performance, used_features, …)
• Data Discovery (SSN, PII, Creditcard, Passwords, …)
• Database Enumeration (custom, NMap support) (screenshot)
• Pentest Features (Guess SID, Check default username/password combinations, …)
• Exploit & Code Library (screenshot)
• Version and Patch Information
• Skins

Here some (old) features of Repscan:

• Password plugin architecture
• Password plugins for Oracle DES, SHA1, OID, APEX, OVS
• Commandline features
• PL/SQL Source Code Analysis Report

Here some statements of Repscan 3.0 users:

“Repscan Rocks”, “I must have this tool.”, “Very cool stuff”, “really like the clean interface… checks are great”, “…tend to be more Oracle security information hub than just scanner :-)”

Over the next  few weeks I will show here more details of some Repscan 3.0 features.

If you want to test Repscan 3.0 you can download it from our exclusive distributor Sentrigo

Geschrieben in software, Tools, source code audit, Security, Oracle Security, Allgemein | Drucken | Keine Kommentare »

6 Dez 2009 von Alexander Kornbrust.

Dennis Yurichev wrote an interesting background article about his FPGA password cracker for Oracle, currently the fastest (known) way to brute force Oracle DES passwords.

Dennis mentioned in the article that “By Oracle’s password standard, first password symbol is always Latin character (one of 26)”. This is not exactely correct if you enclose the password in double quotes. In this case all characters are allowed. I tested the FPGA cracker with the following test case and it seems not to crack the hash (currently still running).

SQL> grant dba to x identified by “1″;

USERNAME                       PASSWORD
—————————— ——————————
X                              4D91C057D0C4D801

If you want to try his FPGA cracker here is the link.
Well done and very interesting article Dennis. The only thing I would be interestedis the price of the FPGA hardware.

Geschrieben in Tools, passwords, Oracle Security | Drucken | Keine Kommentare »

29 Nov 2009 von Alexander Kornbrust.

This time I want to present a new super-fast password cracker.Ivan Golubev released a new version of his password cracker IGhashGPU.  I know the tool for a while but in older versions of IGHASHGPU Oracle SHA1 passwords were not supported.

The new version 0.62 supports now also Oracle 11g hashes (SHA1 + salt). The remarkable thing is the speed of cracking passwords. Ivan’s cracker is using the GPU for cracking the passwords. Without a GPU (NVidia or ATI) or within  a virtual machine the tool is not working.

On a dual ATI 5970 configuration (forum entry) the tool can crack approx. 790 (!!!) Million hashes per second. A single ATI 4850 can achieve more than 300 Mill. hashes per second. This means that the new 11g password algorithm can be cracked approx 130 times faster than the old DES algorithm. I am not sure if it was a good idea from Oracle to use such a standard algorithm like SHA1 because this is together with MD5 one of the most optimized algorithms.

Here is a short comparison between cracking old Oracle DES based passwords and new Oracle 11g SHA1 based passwords. I used the fasted software BF password cracker for Oracle DES (Repscan  from Red-Database-Security or woraauthbf, both with approx. 6 Mill hashes on a Core i7) and compared it with the configuration of running IGHASHGPU on a dual 5970 configuration (790 Mill hashes per second).

Here are some benchmark numbers. I know that 11g supports case sensitive passwords but from my experience most people use normally lowercase passwords with the first character converted to uppercase.In such a case it is not necessary to crack the entire key space.

26 characters, length 6:   DES: 53 seconds,  SHA1: 0.4 seconds

26 characters, length 7:   DES: 23 min,  SHA1: 10 seconds

26 characters, length 8:   DES: 10 h,  SHA1: 4.6 minutes

26 characters, length 9:   DES: 11 days,  SHA1: 2 hours

26 characters, length 10:   DES: 283 days,  SHA1: 2 days

If you are interested to download the tool you can get it from here.

Geschrieben in Tools, 11g | Drucken | 2 Kommentare »

17 Nov 2009 von Alexander Kornbrust.

Metasploit 3.3, the leading exploit framework is out. Here an extract from the Metasploit blog:

“Oracle exploit support has been implemented through a tag-team effort between MC and Chris Gates, with assistance from Alexander Kornbrust. Oracle modules have been developed for exploiting TNS protocol stack and Web-based Oracle services, as well as post-authentication database-level privilege escalation flaws. ”

Version 3.3. (release notes) is the largest known ruby application (375,000 lines of code) and comes with some new Oracle features

• Support for the Oracle InstantClient Ruby driver as an exploit mixin
• Extensive support for exploitation and post-exploitation tasks against Oracle databases

Have fun using Metasploit.

Geschrieben in Tools, Exploit, Oracle Security, Allgemein | Drucken | Keine Kommentare »

13 Nov 2009 von Alexander Kornbrust.

During my research on Russian websites I found a new security tool called “Oracle Security Tools“. This tool offers different methods to exploit Oracle databases.

Here is a list of features

• The privileges escalation of the Oracle users;
• The verification of system accounts concerning the existence of a default password;
• Account compliance test of login=password
• The execution of the PL/SQL code;
• The privileges escalation in the OS Windows 2000/XP/2003 (add a local user as root and holder of remote connection powers);
• The infiltration into the OS and the execution of DOS-commands, holding the administrative rights.
• Viewing the users’ connections to the database and their activity;
• Analyse the external TNS listener.log;

After checking the executable on virustotal I run the program on one of my test VMwares. After switching the russian interface to the english interface I not able to run the tool. I always got the error message:

It seems to be a problem with my vmware system and the mulitple Oracle Homes. After switching to another computer the program was working without problems.

Geschrieben in Tools, Exploit | Drucken | 1 Kommentar »