Umm... Sorry, but what do you really expect to learn from knowing the technical specs?
You are referring to shutter speed, aperture, ISO, and all that - right?
(If not, we need further clarification on what you are asking.)
Judging by the DOF, I would guess somewhere between f/2.8 and f/4 - but closer to 2.8. Shutter speed is really of no importance in a shot like this; yeah, fast enough to hand hold, but other than that - it doesn't matter.
Whatever it took to get the 'right' exposure.
Aperture can be guessed close enough, and the rest doesn't really matter.
The only other thing (that I'm not going to guess at) is what lens he used.
Not sure how much that would really help either...
You can learn more by looking at the photo than you can by reading the 'exif'.
Well, it seems this thread still has some life. So, to answer your question:
I am now interested in doing more serious portrait work. This got me thinking about "famous portraits" - - which of course immediately led to Afghan girl.
When I looked at the photo online with a (new) critical eye towards the photography behind it rather than just the impact of the photo itself, I was immediately struck by the catch-lights in her eyes.
I have been reading a fair amount about portraiture work, which includes creating good catch-lights to really make the subjects appear alive - - and sometimes the great lengths photographers go in using proper (and artificial) lighting to do this.
I did not know much about the photo-taking itself for Afghan girl - - but thought it was just a quick shot. I searched the Internet and was surprised to find that I could not find any info on the shot, other than that McCurry used Kodachrome (slide film).
Given the great reaction this photo has created, and the way it has apparently moved so many people world-wide, I thought it might be an interesting photographic exercise to "deconstruct" the photo - - and figure out how it had been made. I was particularly interested in how he got such great catch-lights running around a refugee camp. (And I am certainly not experienced enough myself to just look at the photo and figure out what happened: hence the reason why I started this thread.)
So I included the photo (with a description similar to the above) in my first post - - and the thread quickly deteriorated from that point on.
Some have already posted here that the shot is not of any interesting technical merit. And yet, something tells me there is more to it than just a nice snapshot.