Multiple Vulnerabilities in innovaphone VoIP Products Fixed

Dear all,

innovaphone fixed several vulnerabilities in two VoIP products that we disclosed a while ago. The affected products are the Linux Application Platform and the IPVA. Unfortunately, the release notes are not public (yet?) and the vendor does not include information about the vulnerabilities for the Linux Application Platform. Therefore, we decided to publish some more technical details for the issues. Continue reading “Multiple Vulnerabilities in innovaphone VoIP Products Fixed”

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IPv6 Surveys / Application Space

In some organizations we work with a certain state of IPv6 deployment has been reached in the interim which includes, among others, the following aspects:

  • the network infrastructure is IPv6-enabled (incl. interface addressing, routing [protocols] and the like).
  • parts of supporting services (security functions, monitoring, system management) include IPv6 in a proper way.
  • 3rd party providers have been contractually obliged to deliver their services in an “IPv6-enabled” mode (as opposed to only being “IPv6-capable” which was the standard requirement in many RFIs during earlier years).

It might then happen that networking people (who often are the initial motivators for deploying IPv6) in such organizations are stating, when asked about IPv6: “it’s [mostly] done”.
Point is that, alas, this does not necessarily mean that a single service or application is *actually using* IPv6, so while the above certainly constitutes an achievement it might not even be halfway through.

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DirectoryRanger 1.5.0 Is Available

The next major release of DirectoryRanger is now available for customers, and for everyone who would like to try it ;-). Current attacks show that quite often the topic of Active Directory Security is not on the security agenda, but it should be, and this was the reason for us to build the tool and, of course, to maintain and improve it. So what are the major new features released with DirectoryRanger 1.5.0? Here we go:

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Back from PowerShell Conference Europe…

The PowerShell Conference Europe 2019 took place last week in Hannover, and I had the pleasure to attend and speak for the second year in a row. I want to thank @TobiasPSP @Alexandair @sqldbawithbeard and the @PSConfEU crew for putting up this #PowerShell feast. From a RaspberryPi to the Clouds, from PowerShell internals to a dancing Lego robot, if you have anything to do with windows, PowerShell, or a computer, there was some content made for you… Continue reading “Back from PowerShell Conference Europe…”

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Windows Insight: Virtual Secure Mode

The Windows Insight repository currently hosts four articles on VSM (Virtual Secure Mode):

  • Virtual Secure Mode: Architecture Overview (Aleksandar Milenkoski): In this work, we discuss the architecture of a virtualized Windows environment.
  • Virtual Secure Mode: Communication Interfaces (Aleksandar Milenkoski): In this work, we discuss the communication interfaces that VSM implements: Isolated User Mode (IUM) system calls, normal-mode services, secure services, and hypercalls.
  • Virtual Secure Mode: Protections of Communication Interfaces (Aleksandar Milenkoski): This work discusses implemented mechanisms for securing the above VSM communication interfaces. This includes restrictions on issuing hypercalls, data marshalling and sanitization, and secure data sharing.
  • Virtual Secure Mode: Initialization (Dominik Phillips, Aleksandar Milenkoski): This work describes the process for VSM initialization activities performed by the Windows loader and the Windows kernel when Windows 10 is booted.

– Aleksandar Milenkoski

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Emotet im Active Directory: Es kann jeden treffen – aber Jeder kann es dem Angreifer schwer machen!

Heise berichtet aktuell öffentlich über die Emotet-Infektion im eigenen Haus, bei dessen Aufklärung ERNW unterstützte. Damit liefert Heise Informationen zum Verlauf aktueller Angriffe, aber insbesondere auch wertvolle Einsichten zu Vorbeugung, Erkennung, Analyse und Gegenmaßnahmen aus eigener Erfahrung, wie sie nur selten der Öffentlichkeit preisgegeben werden.

Ein Team aus Incident-Response Spezialisten der ERNW Research unterstützte Heise bei der Analyse und Rekonstruktion des Vorfalls und analysierte die Schadsoftware, um deren Ausbreitungswege nachzuvollziehen und IoCs (Indicators of Compromise) zu extrahieren. Hierdurch konnten effektive Gegenmaßnahmen entwickelt und gemeinsam mit Heise erfolgreich umgesetzt werden.

Im Zuge dessen unterstützten Active-Directory-Spezialisten der ERNW Heise bei der Konzeption und dem Wiederaufbau eines neuen Active Directory. Im heisec-Webinar am 3. Juli berichtet Heise über den Incident und die wichtigsten Erkenntnisse daraus. Dabei sein werden zwei unserer Active Directory-Security-Spezialisten. Sie werden Konzepte und Verfahren für ein sicheres, resilientes und trotzdem betreibbares Active Directory vorstellen und den Teilnehmern mit Tipps für Containment nach einer Infektion und in gemeinsamer Diskussion zur Verfügung stehen.

Bei Interesse an diesem Thema beachten Sie auch die vielen Vorträge internationaler Active Directory-Security-Spezialisten des Active Directory Security Tracks auf der diesjährigen Troopers (so wie unsere eigenen Beiträge dazu, wie etwa hier und hier) und unsere Workshops zu Active Directory-Sicherheit und Inicdent Response.

Wir wünschen allen Lesern ein schönes verlängertes und hoffentlich Incident-freies Pfingstwochenende!


Friedwart Kuhn & Andreas Dewald.

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Windows Insight: The TPM

The Windows Insight repository currently hosts three articles on the TPM (Trusted Platform Module):

  • The TPM: Communication Interfaces (Aleksandar Milenkoski): In this work, we discuss how the different components of the Windows 10 operating system deployed in user-land and in kernel-land, use the TPM. We focus on the communication interfaces between Windows 10 and the TPM. In addition, we discuss the construction of TPM usage profiles, that is, information on system entities communicating with the TPM as well as on communication patterns and frequencies;
  • The TPM: Integrity Measurement (Aleksandar Milenkoski): In this work, we discuss the integrity measurement mechanism of Windows 10 and the role that the TPM plays
    as part of it. This mechanism, among other things, implements the production of measurement data. This involves calculation of hashes of relevant executable files or of code sequences at every system startup. It also involves the storage of these hashes and relevant related data in log files for later analysis;

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The Week in Review #RIPE78

This week Chris and I participated in the RIPE 78 meeting in Reykjavík. Being part of the group was fun as always and we had quite some interesting conversations with peers from (not only) the IPv6 community.
Big thanks to the RIPE NCC team for the smooth organization and for taking care of us!

In this post I’ll provide some notes on talks I found particularly interesting, plus links to our own contributions.

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