I recently installed Siemens LOGO! Comfort V8.3 on macOS Monterey on a 14″ M1 MacBook Pro. This is not completely straight-forward as Monterey is not officially supported by Siemens. Using some tweaks, I got it working anyway. Please be aware that I didn’t test all features, so use this at your own risk.
Running Siemens LOGO! Comfort V8.3 on macOS Monterey with Apple Silicon Read More »
If you’re using Microsoft Exchange on-premise and you want to protect your setup against the recent CVE-2022-41040 and CVE-2022-41082 zero-day vulnerabilities, you can follow Microsoft’s instructions to set up a rewrite rule in IIS. If your Exchange setup is behind HAProxy, you can also block the requests at the proxy level. This is especially useful
Blocking Exchange CVE-2022-41040 Attacks via HAProxy Read More »
Since many years, I’m running my own email server, based on self-written SMTP and IMAP services, a MySQL database backend and a PHP-based webmail frontend. Ever since Apple released iPhone OS supporting push e-mail, I’ve been interested in getting it to work with my own email stack. My journey led me to Apple Open Source
Reverse-Engineering macOS Server APNS Push Certificate Retrieval Read More »
Missing input validation and missing authentication allow attackers with the ability to connect to TCP/IP ports on localhost:26822 (e.g. any low-privileged user space process) to download and/or launch arbitraty executables with elevated privileges.
CVE-2022-31877: Privilege Escalation in MSI Center Read More »
My parents bought a camper / mobile home which has a TV running on its internal 12V supply. For rainy days, they wanted to add a Blu-ray player to watch movies, but unfortunately the 230V supply is only available when the camper is connected to a power supply and not when running in self-sustaining mode
Running a Samsung Blu-ray Player on 12V Read More »
Yesterday, the status monitor software of my Brother HL-2250DN informed me about a new firmware update. I decided to install the update, but at 90%, the update process interrupted. The update tool complained that it cannot connect to the printer anymore.
Resurrecting a Brother Printer after a Failed Firmware Update Read More »
Welcome to my new blog! I’m going to use this blog as a collection of notes I consider interesting. The first blog post after this one has been migrated from my old, non-maintained blog hosted on Blogger.com.