[Png-mng-security] security bug in png_handle_tRNS

[Greg Roelofs]

> I just got a reply from CERT:

>   Thank you for the report, we are tracking this as VU#684664.
>   We will follow up with our established contacts at libpng.

> Greg or maybe Andreas Dilger is probably the "established contact".

I wouldn't expect it to be me--I don't think I've ever reported a libpng
security issue or claimed to be the maintainer or security contact.  But
I'll forward anything that comes my way...

Greg