<s>
Cache	B-General_Concept
poisoning	I-General_Concept
refers	O
to	O
a	O
computer	O
security	O
vulnerability	O
where	O
invalid	O
entries	O
can	O
be	O
placed	O
into	O
a	O
cache	B-General_Concept
,	O
which	O
are	O
then	O
assumed	O
to	O
be	O
valid	O
when	O
later	O
used	O
.	O
</s>
<s>
Two	O
common	O
varieties	O
are	O
DNS	O
cache	B-General_Concept
poisoning	I-General_Concept
and	O
ARP	O
cache	B-General_Concept
poisoning	I-General_Concept
.	O
</s>
<s>
involves	O
the	O
poisoning	O
of	O
web	B-Protocol
caches	I-Protocol
.	O
</s>
<s>
Attacks	O
on	O
other	O
,	O
more	O
specific	O
,	O
caches	B-General_Concept
also	O
exist	O
.	O
</s>
