I server replying with 'HTTP/.1 409\n:"\rB\n \n' can cause Safari to crash because of a NULL ptr Read AV.
A have a zip with a small server written in python that can be used to serve the repro. Install python, unzip the file and run:
ReproServer.py "AMD-SKYLINED-NL - Safari 525.26.13 (WebKit 525.26.2) - 0640018F - ReadAV(mov)@CoreFoundation!CFCharacterSetInitInlineBuffer+0x357.asResponseLog.zuul3.pickle"
Then browser to http://localhost:28876 in Safari to see the crash.
As soon as I figure out how to upload it, I'll do so.
Created attachment 26141 [details]
Small server that can be used to repro this case
As described in my first comment.
Closing as INVALID, as HTTP response parsing in performed by Apple closed source frameworks. Thank you for reporting this issue, it will continue to be tracked by Apple internally.
I couldn't reproduce this on Mac OS X 10.5.6. I didn't try to reproduce on Windows.