Some security issues by oreilly

Just found that:
http://www.oreillynet.com/pub/a/linux/2003/06/16/insecurities.html

Interesting for (B)LFS might be the section with linux kernel 2.4 and gnu zip.
Can anyone confirm these issues and does know, which versions are vulnerable?

-- 
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%> ln -s /dev/null /dev/brain
%> ln -s /dev/urandom /dev/world
%> dd if=/dev/world of=/dev/brain

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