My Canon Powershot SX530 HS suffers from bad Purple, Blue and Green chromatic aberration when taking pictures in high contrast area. I use Darla's Purple Fringe script for GIMP to deal with Purple chromatic aberration - some limitations but that's the best solution that I can find.
I could not find any GIMP scripts for dealing with Blue and Green chromatic aberration. So I did the next best thing: I rolled my own.
The code for the scripts are below. Once installed, it will appear under the "Script-Fu / Enhance /" menu. And one more thing: the same limitations apply as with Darla's Purple Fringe script.