UNIX security holes

[rls]

News reports and other published literature regularily
states the use of "well-known" security holes in UNIX
by hackers and system crackers.  I've read about the
one in sendmail, but none others.  Since they're so
"well-known", would someone be willing to identify them
to me (curiosity, you know), or tell me where there is
doc on them?
-- 
Richard L. Serna                 |  uucp:     {alberta,bode}!aeswaei!rls
Atmospheric Environment Service  |  internet: rls at ee.ualberta.ca
Edmonton, Alberta, Canada        |  voice:    403-468-7944