8 Apr 2010 von Alexander Kornbrust.

Today I want to present the Netsparker Community Edition.

Netsparker (from Mavituna Security) is the best web application scanner I know. Easy to use and a really good web application scanning results.  It saved me a lot of time and helped me to find security bugs in Oracle applications (Enterprise Manager).

The best thing: The new community edition is free (OK, with some limitations).

The commercial versions have even more interesting features like Time Based Blind SQL Injection, Remote Code Injection, OS Level Command Injection , CRLF / HTTP Header Injection / Response Splitting, …. The entire feature (and price) list is available here.

Here is a screenshot from Netsparker:

If you are interested just download the community edition.

Geschrieben in software, Security, Allgemein | Drucken | Keine Kommentare »

6 Apr 2010 von Alexander Kornbrust.

This weekend I installed the new version of Oracle 11.2.0.1 (64 bit) for Windows. The 11.2 version for Windows is available since a few days.

I installed the 64 bit version (default installation (next - next - …)) without any problems  on Windows 7 system. After that I run a default check with our database scanner Repscan 3 (the most advanced database scanner) against this new database version. According to Repscan this new 11.2.0.1 is no longer vulnerable against the DBMS_JVM_EXP_PERMS exploit and this is correct. Oracle has already fixed the problem. I expect a solution in the upcoming Oracle CPU April 2010.

A quick check in the Repscan database browser shows the difference in the privileges:

11.2.0.1.0 Linux:

11.2.0.1.0 Windows:

Oracle removed the public privilege from DBMS_JVM_EXP_PERMS and granted privileges to the roles “IMP_FULL_DATABASE” and “DATAPUMP_EXP_FULL_DATABASE”.   The privileges of DBMS_JAVA and DBMS_JAVA_TEST are not modified.

The package DBMS_JVM_EXP_PERMS contains also a bug fix. A comparision between the Windows and Linux version shows the following differencein the package body.

— DBMS_JVM_EXP_PERMS  (only in 11.2.0.1 Windows) ——————
[…]
– Check privs
sys.dbms_zhelp_ir.check_sys_priv(DBMS_ZHELP_IR.KZSSTA);
[…]
— DBMS_JVM_EXP_PERMS ——————
After that I analyzed the Oracle database with the Repscan database browser (really useful component, just try the trial version of Repscan) found a few suspicous audit entries in my audit log (sys.aud$).

A user AIME from the terminal “ST-ADC\DADVFH0169″ had a connection to my database?I know that the terminal “ST-ADC\DADVFH0169″ is a terminal somewhere from Oracle. A backdoor in 11.2.0.1? Someone from Oracle was accessing my database?

No. After I checked the timestamp I saw that this entry was created 2 days BEFORE I installed my database. Oracle only forgot to cleanup the audit log before delivering it to customers. If you install Oracle 11.2.0.1 you should truncate the SYS.AUD$ table to avoid questions from (internal/external) auditors.

Geschrieben in Repscan, 11g, Security | Drucken | Keine Kommentare »

30 Mrz 2010 von Alexander Kornbrust.

Microsoft released a patch for CVE-2010-0490. More than 1 year ago I reported this issue to Microsoft.

Finally they fixed the problem.

Bug History:

5-February-2009 - Bug reported to Microsoft Security Response Center

30-March-2010 - Patch for CVE-2010-0490 released

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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 »

22 Feb 2010 von Alexander Kornbrust.

Sumit Siddarth (Sid) has just published a really good whitepaper about “Hacking Oracle from the Web“.This is the most comprehensive published collection of different techniques for attacking Oracle from the web. Sid spent a lot of time composing the different techniques mentioned in various presentations and whitepapers.

Sid describes various techniques like data extraction (inband techniques like union or error messages, out-of-band techniques like heavy queries, blind, …), privilege escalation (sys.kupp$proc, dbms_repcat_rpc and dbms_export_extension)  and OS code execution.

Well done Sid.

Geschrieben in Exploit, SQL Injection, Security | Drucken | Keine Kommentare »