Today, we describe our findings at United Parcel Service of America, Inc. (UPS), another German parcel market player, and the corresponding vulnerabilities’ disclosure process.
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Continue readingTag: disclosure
Lua-Resty-JWT Authentication Bypass
I was writing some challenges for PacketWars at TROOPERS22. One was intended to be a JWT key confusion challenge where the public key from an RSA JWT should be recovered and used to sign a symmetric JWT. For that, I was searching for a library vulnerable to JWT key confusion by default and found lua-resty-jwt. The original repository by SkyLothar is not maintained and different from the library that is installed with the LuaRocks package manager. The investigated library is a fork of the original repository, maintained by cdbattags in version 0.2.3 and was downloaded more than 4.8 million times according to LuaRocks.
While looking at the source code I found a way to circumvent authentication entirely.
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Continue readingBreaking DPD Parcel Tracking
This blog post is the continuation of our parcel research. We already reported about how we broke parcel tracking at DHL and the disclosure process of the identified problems. As DHL is not the only parcel service in Germany, we also investigated the other available parcel services. In this blog post, we want to talk about DPD, also called Geopost, which belongs to the French Post Office.
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Continue readingManiMed: Ypsomed AG – mylife YpsoPump System Vulnerabilities
Manipulating Medical Devices
The Federal Office for Information Security (BSI) aims to sensitize manufacturers and the public regarding security risks of networked medical devices in Germany. In response to the often fatal security reports and press releases of networked medical devices, the BSI initiated the project Manipulation of Medical Devices (ManiMed) in 2019. In this project, a security analysis of selected products is carried out through security assessments followed by Coordinated Vulnerability Diclosure (CVD) processes. The project report was published on December 31, 2020, and can be accessed on the BSI website [1].
Continue reading “ManiMed: Ypsomed AG – mylife YpsoPump System Vulnerabilities”
Continue readingManiMed: Hamilton Medical AG – HAMILTON-T1 Ventilator Vulnerabilities
Manipulating Medical Devices
The Federal Office for Information Security (BSI) aims to sensitize manufacturers and the public regarding security risks of networked medical devices in Germany. In response to the often fatal security reports and press releases of networked medical devices, the BSI initiated the project Manipulation of Medical Devices (ManiMed) in 2019. In this project, a security analysis of selected products is carried out through security assessments followed by Coordinated Vulnerability Diclosure (CVD) processes. The project report was published on December 31, 2020, and can be accessed on the BSI website [1].
Continue reading “ManiMed: Hamilton Medical AG – HAMILTON-T1 Ventilator Vulnerabilities”
Continue readingManiMed: B. Braun Melsungen AG – Space System Vulnerabilities
Manipulating Medical Devices
The Federal Office for Information Security (BSI) aims to sensitize manufacturers and the public regarding security risks of networked medical devices in Germany. In response to the often fatal security reports and press releases of networked medical devices, the BSI initiated the project Manipulation of Medical Devices (ManiMed) in 2019. In this project, a security analysis of selected products is carried out through security assessments followed by Coordinated Vulnerability Diclosure (CVD) processes. The project report was published on December 31, 2020, and can be accessed on the BSI website [1].
Continue reading “ManiMed: B. Braun Melsungen AG – Space System Vulnerabilities”
Continue readingManiMed: Innokas Yhtymä Oy – VC150 Patient Monitor Vulnerabilities
Manipulating Medical Devices
The Federal Office for Information Security (BSI) aims to sensitize manufacturers and the public regarding security risks of networked medical devices in Germany. In response to the often fatal security reports and press releases of networked medical devices, the BSI initiated the project Manipulation of Medical Devices (ManiMed) in 2019. In this project, a security analysis of selected products is carried out through security assessments followed by Coordinated Vulnerability Diclosure (CVD) processes. The project report was published on December 31, 2020, and can be accessed on the BSI website [1].
Continue reading “ManiMed: Innokas Yhtymä Oy – VC150 Patient Monitor Vulnerabilities”
Continue readingManiMed: Philips Medizin Systeme Böblingen GmbH – IntelliVue System Vulnerabilities
Manipulating Medical Devices
The Federal Office for Information Security (BSI) aims to sensitize manufacturers and the public regarding security risks of networked medical devices in Germany. In response to the often fatal security reports and press releases of networked medical devices, the BSI initiated the project Manipulation of Medical Devices (ManiMed) in 2019. In this project, a security analysis of selected products is carried out through security assessments followed by Coordinated Vulnerability Diclosure (CVD) processes. The project report was published on December 31, 2020, and can be accessed on the BSI website [1].
Continue readingRoot Cause Analysis of a Heap-Based Buffer Overflow in GNU Readline
In the last blog post, we discussed how fuzzers determine the uniqueness of a crash. In this blog post, we discuss how we can manually triage a crash and determine the root cause. As an example, we use a heap-based buffer overflow I found in GNU readline 8.1 rc2, which has been fixed in the newest release. We use GDB and rr for time-travel debugging to determine the root cause of the bug.
Continue reading “Root Cause Analysis of a Heap-Based Buffer Overflow in GNU Readline”
Continue readingVMware NSX-T MITM Vulnerability (CVE-2020-3993)
NSX-T is a Software-Defined-Networking (SDN) solution of VMware which, as its basic functionality, supports spanning logical networks across VMs on distributed ESXi and KVM hypervisors. The central controller of the SDN is the NSX-T Manager Cluster which is responsible for deploying the network configurations to the hypervisor hosts.
This summer, I looked into the mechanism which is used to add new KVM hypervisor nodes to the SDN via the NSX-T Manager. By tracing what happens on the KVM host, I discovered that the KVM hypervisor got instructed to download the NSX-T software packages from the NSX-T Manager via unencrypted HTTP and install them without any verification. This enables a Man-in-the-Middle (MITM) attacker on the network path to replace the downloaded packages with malicious ones and compromise the KVM hosts.
After disclosing this issue to VMware, they developed fixes and published the vulnerability in VMSA-2020-0023 assigning a CVSSv3 base score of 7.5.
Continue reading “VMware NSX-T MITM Vulnerability (CVE-2020-3993)”
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