"According to Finjan Software, which has just released its latest Web
trends report, caching technology used by search engines, ISPs and
large companies has been discovered to harbour certain kinds of
malicious code even after the website that hosted it has been taken
down.
Such "infection-by-proxy" code can remain in caches for as
long as two weeks, giving it a "life after death" at a time it would
conventionally be assumed to have been neutralised. Although caching
does not always save copies of everything on a website, it will still
store code embedded in html, including programming formats such as
Javascript. "
Article Link: http://www.techworld.com/security/news/index.cfm?newsID=7083&pagtype=all
