http://en.wikipedia.org/wiki/Zsync http://freshmeat.net/projects/zsync/
The author claims that there are no security issues with his included zlib: --- No, it uses a customised zlib; the compressed file support requires extra hooks which are not present in the standard zlib distribution. I applied patches for a number of zlib issues last year; I'm not aware of any outstanding security issues, but haven't been actively keeping an eye out for them either. --- So if someone knows of any issues which are still in his copy of zlib, I assume it is best to notify him.
In CVS