this post was submitted on 08 May 2024
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Isn't the backdoor locked to its developer's key so nobody else can use it?
Yes, indeed the backdoor code checks, in the event of ssh authentication with a certificate, that it was signed with a specific ssh private key (their own CA), the corresponding public key being hardcoded in the backdoor code.
But this project xzbot demonstrates how to patch the corrupted liblzma to replace the key