Demystifying the Pl0x GitHub attack

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Background

Software engineer Stephen Lacy found 35,000 surprises a week before Patch Tuesday. The code of many thousands of repos had had code inserted, which sent environment variables to a Russian virtual private server and ran code from that server. Strangely, these identically written backdoors appeared to have been committed by many developers going back for years.

Lacy notified GitHub who quickly zapped the affected repos and reported the good news that the affected repos were all just c…

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