http://www.sarc.com/avcenter/venc/data/php.pirus.html
PHP.Pirus is the first virus written in PHP, a server-side scripting
language used for dynamic Web page generation.
The virus searches for .php and .htm files and inserts code to call
itself. The virus executes only on servers with PHP interpreters.
This virus cannot be contracted by simply visiting an infected Web page.
--------------------
There are obvious drawbacks to using something like this, but in the
world of open source, might someone write a virus that affects source
code instead of binaries? CVS will protect against this to some degree
but it could be nasty considering, "everyone's a developer"..
Donncha.
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