Misc
by Florian Bausch

When Your Edge Browser Syncs Private Data to Your Employer

Recently, one of our customers contacted us to investigate the extent of some unwanted and unexpected behavior regarding browsing data of employees.

Employees started contacting IT support because private browser bookmarks, private login credentials etc. showed up on their work machines. All affected employees stated that they never created these bookmarks on work systems. And interestingly, the data seemed to have been collected over quite some time.

Our customer wanted to understand how private data ended up in their environment. Obviously, private employee data in the enterprise landscape could cause some data privacy trouble (GDPR).

Our customer suspected that Microsoft Teams might be related to this because the company’s employees are allowed to join Teams meetings from private devices. Since this option was often used in many companies during COVID-related work-from-home times, we suspect that a larger number of enterprises may be affected by this problem.

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Misc
by Justus Hoffmann

Jigsaw RDPuzzle: Piecing Attacker Actions Together

In a recent incident response project, we had the chance to virtually look over the attackers’ shoulder and observe their activities. The attackers used the Remote Desktop Protocol (RDP) for lateral movement within the compromized environment and beyond (MITRE techniques T1570, T1021). As a matter of fact, RDP creates cache files that contain tiles of the transferred screen recording data. While this fact is well-known and there are existing tools, we found it worth reporting because of two different aspects:

  • On the one hand, we want to raise awareness for this valuable piece of evidence, explain how it works, how tooling works and how it can be used. In this particular case, the analysis of those cache files yielded valuable insights into the attackers’ activity and allowed further measures.
  • On the other hand, we found it exciting to look over the attacker’s shoulder, see the desktop as they saw it, and the commands they typed. We want to share parts of those insights as far as we are able to show them publicly.

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Breaking, Misc
by Dennis Heinze

Part I: Bluetooth Auracast from a Security Researcher’s Perspective

Auracast, the new Bluetooth LE Broadcast Audio feature has gained some publicity in the past months. The Bluetooth SIG has introduced the LE Audio feature-set to the Bluetooth 5.2 Specification in 2019 and vendors are only now starting to implement it. Auracast facilitates broadcasting audio over Bluetooth LE to a potentially unlimited number of devices. It does not require pairing or interaction between the sender and the receivers.

We also presented this topic at 38c3. This blog post will contain similar contents albeit with some more details.

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Breaking
by Marius Walter

Vulnerability Disclosure: Command Injection in Kemp LoadMaster Load Balancer (CVE-2024-7591)

While conducting security research, I identified a critical vulnerability in Kemp’s LoadMaster Load Balancer. This vulnerability is a Command Injection and allows full system compromise. It requires no authentication and can be exploited remotely by having access to the Web User Interface (WUI). Kemp found that all LoadMaster versions up to and including version 7.2.60.0 and also the multi-tenant hypervisors up to and including version 7.1.35.11 are affected.

Kemp LoadMaster is a widely used Load Balancing Application that can commonly be seen in customer engagements. Therefore, we decided to take a closer look as part of our regular research projects.

As promised in the Announcement: Progress / Kemp LoadMaster CVE-2024-7591, I will go into detail about how I identified the vulnerability, where the vulnerable part of the code is, how the vulnerability can be exploited, and finally, how the vendor fixed this vulnerability.

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Breaking
by Nils Emmerich

Vulnerability Disclosure: Authentication Bypass in Vaultwarden versions < 1.32.5 - CVE-2024-55225

During a penetration test for a customer, we briefly assessed Vaultwarden, an open-source online password safe. In June 2024, the German Federal Office for Information Security (BSI) published results1 of a static and dynamic test of the Vaultwarden server component. Therefore, only a partial source code audit was performed during our assessment. However, a quick look was needed to find some glaring issues with the authentication.
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Misc
by Florian Grunow

Announcement: Progress / Kemp LoadMaster CVE-2024-7591

Hey everybody,

during a recent Red Teaming engagement Marius Walter from ERNW found a command injection issue in Progress (Kemp) LoadMaster. It was registered as CVE-2024-7591 and scores a CVSS of 10.0.

The vendor already has patches out, make sure to apply them as this is a high severe issue. You can find the official announcement and the patch references on the official support page.

Marius will follow up with a technical blog post on this issue once we think everybody had a realistic chance of applying the patches.

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Breaking
by Florian Kiersch

Disclosure: Potential Limitations of Apple ADE in Corporate Usage Scenarios

Apple Automated Device Enrollment (ADE) is presented as a way to automate and simplify the enrollment process of Apple devices within Mobile Device Management (MDE) solutions. This blog post is aimed at organizations currently planning or even already using this feature and making you, the reader, aware of potential limitations of this process that might otherwise not be clearly addressed in your companies’ device management process.

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Breaking
by Jan Ruge

Disclosure: Apple ADE – Network Based Provisioning Bypass

Mobile Device Management (MDM) solutions are used to centrally manage mobile devices in corporate environments. This includes the monitoring of the device, automatic installation/removal of apps or certificates and restrict the functionality. Even though MDM solutions exist for multiple vendors, we will look specifically on Apple devices enrolled via Intune. When an Apple device is registered for Automated Device Enrollment (ADE), it will automatically download and apply these policies during the initial setup and prior to the first boot.

During a customer project, we identified a network-based provisioning bypass which prevents the iPad to fetch and apply the provisioning profiles. Continue reading “Disclosure: Apple ADE – Network Based Provisioning Bypass”

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Building, Misc
by Matthias Hamann

BMBF UNCOVER – Monitoring von Sicherheitsvorfällen in Fahrzeugen

English Abstract

For the realization and introduction of autonomous vehicles, the safe interaction of functions, systems and services as well as their monitoring over the entire product life cycle is essential. An exclusive security-by-design approach is no longer sufficient and must be continuously supported by feedback obtained from in-the-wild operation. This is where the recently successfully completed joint project BMBF UNCOVER comes into play, which targets the requirements of the standards ISO/SAE 21434 (Road vehicles – Cybersecurity engineering) and ISO 21448 (Road vehicles – Safety of the intended functionality (SOTIF)).

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