Finally it’s here!
pytacle is a tool inspired by tentacle. It automates the task of sniffing GSM frames of the air, extracting the key exchange, feeding kraken with the key material and finally decode/decrypt the voice data. All You need is a USRP (or similar) to capture the GSM band and a kraken instance with the berlin tables (only about 2TB 😉 )
I’ve posted a preview before, take a look at the video to see the tool in action.
Continue reading Continue readingMicrosoft takes this vulnerability quite serious and was acting fast. The Microsoft Security Response Center announced the availability of a fix last night in the MSRC Blog.
The fix will be available via Windows Update on friday, the 21st of september. So it’s time to get ready for this update ;-).
Have a nice day
Michael
Actually a Windows Vulnerability (Microsoft Advisory 2757760) related to the Internet Explorer Version 7, 8 and 9 is in the news. Microsoft is aware of the problem, but there’s no patch available yet. We call this a 0-Day :-). Making the problem even worse, on monday reliable exploit code was released within the Metasploit project, so exploit code is already in the wild.
Basically Microsoft suggests two workarounds:
But both of them have some impact: EMET must be deployed before any usage (btw. EMET can be configured via Group Policies) and disabling Active X and Active Scripting might break some business relevant web sites (that can be added to the “Trusted Sites” Zone, but might produce major operational effort).
Continue reading Continue readingIn our last series of posts regarding the VMDK file inclusion attack, we focused on read access and prerequisites for the attack, but avoided stating too much about potential write access. But as we promised to cover write access in the course of our future research, the following post will describe our latest research results.
First of all, the same prerequisites (which will be refined a little bit more later on) as for read access must be fulfilled and the same steps have to be performed in order to carry out the attack successfully. If that is the case, there are several POIs (Partitions Of Interest) on a ESXi hypervisor that are interesting to include:
Continue reading Continue readingLast week I read about the new networking features of the integrated vSwitch of Hyper-V 3.0. I was quite surprised that RA Guard will be natively supported and was curious about implementation and functionality. If you don’t know how RA Guard works, I recommend reading our previous blog posts here, here, here, here and here, or have a look at our workshop at Troopers12.
I downloaded Windows Server 2012 RC to do some practical testing. Since my girlfriend was working the whole weekend, I had plenty of time to play around with all that stuff without risking trouble 😉
Continue reading Continue readingSome days ago another advisory related to a web application firewall (WAF) product was published. This time the product Airlock by Ergon was affected by a vulnerability that combines Encoding and NULL Byte attacks to circumvent the pattern based detection engine. We have described these attacks in detail in our newsletter “Web Application Firewall Security and The Swiss Army Knife for Web Application Firewalls” because they belong to a well known category of attacks against WAFs.
Continue reading Continue readingAs we are receiving a lot of questions about our VMDK has left the building post, we’re compiling this FAQ post — which will be updated as our research goes on.
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How does the attack essentially work?
By bringing a specially crafted VMDK file into a VMware ESXi based virtualization environment. The specific attack path is described here.
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What is a VMDK file?
A combination of two different types of VMDK files, the plain-text descriptor file containing meta data and the actual binary disk file, describes a VMware virtual hard disk. A detailed description can be found here.
Continue reading Continue readingIf you want to extract some data from a database you first need to gather knowledge about the internal structure of the database.
One of the first steps (after determining the database type) is enumerating the
available tables and the corresponding columns. Most database systems have a
meta database called information_schema. By querying this database it is
possible to get information about the internal structure of the installed
databases. For example you could get the tables and their corresponding columns
in MS SQL and MySQL by injecting
“SELECT table_name, column_name FROM information_schema.columns“. Oracle
databases have their own meta tables, so you have to handle them differently.
For getting the same output in Oracle, you have to query the all_tab_columns
table (or user_tab_columns if you only want to search in the currently selected
database). If the found vulnerability only allows to receive a single column (or
if it is too complicated to identify two columns in the server response) you
could concatenate the columns to one single string, e.g. in Oracle:
“SELECT table_name||':'||column_name FROM all_tab_columns“.
As announced at last week’s #HITB2012AMS, I’ll describe the fuzzing steps which were performed during our initial research. The very first step was the definition of the interfaces we wanted to test. We decided to go with the plain text VMDK file, as this is the main virtual disk description file and in most deployment scenarios user controlled, and the data part of a special kind of VMDK files, the Host Sparse Extends.
Continue reading Continue readingThere are some database specifics, every pentester should be aware of, when testing for and exploiting SQLi vulnerabilities. Besides the different string concatenation variants already covered above, there are some other specifics that have to be considered and might turn out useful in some circumstances. For example with Oracle Databases, every SELECT statement needs a following FROM statement even if the desired data is not stored within a database. So when trying to extract e.g. the DB username using a UNION SELECT statement, the DUAL table may be utilized, which should always be available. Another point, if dealing with MySQL, is the possibility to simplify the classic payload
Continue reading Continue reading