this post was submitted on 04 Apr 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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This is the best summary I could come up with:
On March 29, Microsoft software developer Andres Freund was trying to optimize the performance of his computer when he noticed that one program was using an unexpected amount of processing power.
The XZ backdoor was introduced by way of what is known as a software supply chain attack, which the National Counterintelligence and Security Center defines as “deliberate acts directed against the supply chains of software products themselves.” The attacks often employ complex ways of changing the source code of the programs, such as gaining unauthorized access to a developer’s system or through a malicious insider with legitimate access.
The malicious code in XZ Utils was introduced by a user calling themself Jia Tan, employing the handle JiaT75, according to Ars Technica and Wired.
Tan’s elevation to being a co-maintainer mostly played out on an email group where code developers — in the open-source, collaborative spirit of the Linux family of operating systems — exchange ideas and strategize to build applications.
Their entire online presence is related to these brief interactions on the mailing list dedicated to XZ; their only recorded interest is in quickly ushering along updates to the software.
A leaked document from the defense contractor HBGary Federal outlines the meticulousness that may go into maintaining these fictive personas, including creating an elaborate online footprint — something which was decidedly missing from the accounts involved in the XZ timeline.
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