Digital Restrictions (DRM) Troubles
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Critically close to zero(day): Exploiting Microsoft Kernel streaming service
The Microsoft Kernel Streaming Server (mskssrv.sys) is a component of a Windows Multimedia Framework service, Frame Server. The service virtualizes the camera device and allows the device to be shared between multiple applications.
I began to explore this attack surface after noting CVE-2023-29360, which was initially listed as a TPM driver vulnerability. The bug is actually in the Microsoft Kernel Streaming Server. Though at the time I was unfamiliar with MS KS Server, the name of this driver was enough to hold my interest. Despite not knowing anything about the purpose or functionality, I thought a streaming server in the kernel could be a fruitful place to look for vulnerabilities. Going in blindly, I sought to answer the following questions: [...]
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Fix linux-browser-installer(8) on FreeBSD
If you want to play DRM locked media on FreeBSD or use web browser that is available on Linux but not on FreeBSD – like Opera or Brave for example – you had quite convenient way to do it – using linux-browser-installer script.
I use it since … I do not remember when – and it always worked like a charm … until recently.