Calling this a backdoor is an extreme measure. I wasn't able to see any working example, nor any responsible disclosure which seems bad.
Also, if somebody has the ability to run arbitrary code on your machine, I would think that it's game over at that point - backdoor or not. This is not a remote exploitable backdoor it seems.
Also, if somebody has the ability to run arbitrary code on your machine, I would think that it's game over at that point - backdoor or not. This is not a remote exploitable backdoor it seems.