TL;DR there was a backdoor found in the XZ program. All major distros have been updated but it is recommended that you do a fresh install on systems that are exposed to the internet and that had the bad version of the program. Only upstream distros were affected.

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[–] 25 points 2 years ago

Catching this now is pretty huge, because it mainly targets distro build systems. Had this gone undetected, we'd be in shiznit creek couple of years down the line.

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