<s>
greenpois0n	B-Operating_System
is	O
a	O
name	O
shared	O
by	O
a	O
series	O
of	O
iOS	B-Application
jailbreaking	I-Application
tools	O
developed	O
by	O
Chronic	O
Dev	B-Application
Team	I-Application
(	O
sometimes	O
called	O
the	O
greenpois0n	B-Operating_System
team	O
)	O
that	O
use	O
exploits	O
to	O
remove	O
software	O
restrictions	O
on	O
iPhones	B-Operating_System
,	O
iPads	B-Operating_System
,	O
iPod	B-Device
Touches	I-Device
,	O
and	O
Apple	B-Device
TVs	I-Device
.	O
</s>
<s>
Greenpois0n	B-Operating_System
's	O
initial	O
release	O
in	O
October	O
2010	O
jailbroke	O
iOS	B-Application
4.1	O
,	O
and	O
its	O
second	O
version	O
in	O
February	O
2011	O
jailbroke	O
iOS	B-Application
4.2.1	O
as	O
well	O
as	O
iOS	B-Application
4.2.6	O
on	O
CDMA	O
iPhones	B-Operating_System
.	O
</s>
<s>
The	O
second	O
generation	O
of	O
the	O
tool	O
,	O
greenpois0n	B-Operating_System
Absinthe	O
,	O
was	O
developed	O
with	O
iPhone	B-Application
Dev	I-Application
Team	I-Application
members	O
and	O
jailbroke	O
iOS	B-Application
5.0.1	O
in	O
January	O
2012	O
(	O
providing	O
the	O
first	O
jailbreak	B-Application
of	O
the	O
iPhone	B-Operating_System
4S	I-Operating_System
)	O
,	O
and	O
a	O
second	O
version	O
jailbroke	O
iOS	B-Application
5.1.1	O
in	O
May	O
2012	O
(	O
providing	O
the	O
first	O
jailbreak	B-Application
of	O
the	O
third	B-Operating_System
generation	I-Operating_System
iPad	I-Operating_System
)	O
.	O
</s>
<s>
Jailbreaking	B-Application
enables	O
root	B-Application
access	I-Application
to	O
the	O
iOS	B-Application
operating	B-General_Concept
system	I-General_Concept
,	O
allowing	O
the	O
installation	O
of	O
applications	O
and	O
customizations	O
that	O
are	O
unavailable	O
through	O
the	O
official	O
App	B-Application
Store	I-Application
for	I-Application
iOS	I-Application
.	O
</s>
<s>
Jailbreaking	B-Application
voids	O
the	O
device	O
's	O
warranty	O
,	O
and	O
Apple	O
releases	O
iOS	B-Application
updates	O
to	O
make	O
jailbreaking	B-Application
more	O
difficult	O
.	O
</s>
<s>
On	O
October	O
12	O
,	O
2010	O
,	O
Chronic	O
Dev	B-Application
Team	I-Application
released	O
Greenpois0n	B-Operating_System
,	O
a	O
desktop-based	O
tool	O
for	O
jailbreaking	B-Application
iOS	B-Application
4.1	O
on	O
iPhone	B-Operating_System
4	O
,	O
iPhone	B-Operating_System
3GS	O
,	O
iPod	B-Device
Touch	I-Device
third	O
and	O
fourth	O
generation	O
,	O
and	O
iPhone	B-Operating_System
OS	O
3.2.2	O
on	O
the	O
iPad	B-Operating_System
1	O
.	O
</s>
<s>
During	O
its	O
development	O
,	O
Apple	O
released	O
the	O
second	O
generation	O
Apple	B-Device
TV	I-Device
,	O
and	O
Greenpois0n	B-Operating_System
's	O
developers	O
reported	O
that	O
it	O
could	O
jailbreak	B-Application
the	O
Apple	B-Device
TV	I-Device
as	O
well	O
.	O
</s>
<s>
The	O
developers	O
announced	O
plans	O
to	O
release	O
it	O
on	O
October	O
10	O
,	O
but	O
after	O
news	O
spread	O
of	O
another	O
jailbreak	B-Application
developer	O
,	O
George	O
Hotz	O
,	O
preparing	O
to	O
release	O
a	O
jailbreaking	B-Application
tool	O
called	O
limera1n	O
that	O
would	O
perform	O
a	O
similar	O
function	O
with	O
a	O
different	O
exploit	O
,	O
the	O
Greenpois0n	B-Operating_System
developers	O
delayed	O
in	O
order	O
to	O
integrate	O
the	O
limera1n	O
exploit	O
,	O
which	O
supported	O
more	O
devices	O
.	O
</s>
<s>
Using	O
limera1n	O
also	O
meant	O
that	O
the	O
original	O
Greenpois0n	B-Operating_System
exploit	O
(	O
SHAtter	O
)	O
could	O
be	O
saved	O
for	O
use	O
in	O
later	O
jailbreaks	B-Application
.	O
</s>
<s>
Both	O
SHAtter	O
and	O
limera1n	O
are	O
boot	B-General_Concept
ROM	I-General_Concept
exploits	O
,	O
which	O
means	O
they	O
cannot	O
be	O
patched	O
by	O
iOS	B-Application
updates	O
because	O
bootROM	B-General_Concept
code	O
is	O
embedded	O
in	O
iOS	B-Application
devices	O
during	O
manufacturing	O
,	O
and	O
cannot	O
be	O
overwritten	O
at	O
any	O
time	O
.	O
</s>
<s>
In	O
February	O
2011	O
,	O
Chronic	O
Dev	B-Application
Team	I-Application
released	O
a	O
new	O
version	O
of	O
greenpois0n	B-Operating_System
to	O
jailbreak	B-Application
iOS	B-Application
4.2.1	O
and	O
to	O
jailbreak	B-Application
iOS	B-Application
4.2.6	O
on	O
the	O
iPhone	B-Operating_System
4	O
CDMA	O
(	O
Verizon	O
)	O
,	O
with	O
desktop-based	O
tools	O
for	O
OS	B-Operating_System
X	I-Operating_System
,	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
It	O
provides	O
an	O
"	O
untethered	O
"	O
jailbreak	B-Application
,	O
which	O
means	O
that	O
the	O
jailbroken	B-Application
device	O
can	O
be	O
rebooted	O
into	O
a	O
jailbroken	B-Application
state	O
without	O
computer	O
assistance	O
or	O
user	O
input	O
.	O
</s>
<s>
It	O
supports	O
iPad	B-Operating_System
,	O
iPhone	B-Operating_System
,	O
iPod	B-Device
Touch	I-Device
,	O
and	O
Apple	B-Device
TV	I-Device
.	O
</s>
<s>
Chronic	O
Dev	B-Application
Team	I-Application
announced	O
support	O
for	O
the	O
newly	O
released	O
iPhone	B-Operating_System
4	O
CDMA	O
before	O
the	O
devices	O
were	O
in	O
stores	O
.	O
</s>
<s>
Developers	O
from	O
Chronic	O
Dev	B-Application
Team	I-Application
and	O
iPhone	B-Application
Dev	I-Application
Team	I-Application
released	O
greenpois0n	B-Operating_System
Absinthe	O
(	O
known	O
as	O
just	O
"	O
Absinthe	O
"	O
)	O
in	O
January	O
2012	O
,	O
a	O
desktop-based	O
tool	O
(	O
for	O
OS	B-Operating_System
X	I-Operating_System
,	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
Linux	B-Application
)	O
to	O
jailbreak	B-Application
the	O
iPhone	B-Operating_System
4S	I-Operating_System
for	O
the	O
first	O
time	O
and	O
the	O
iPad	B-Operating_System
2	I-Operating_System
for	O
the	O
second	O
time	O
,	O
on	O
iOS	B-Application
5.0.1	O
for	O
both	O
devices	O
and	O
also	O
iOS	B-Application
5.0	O
for	O
iPhone	B-Operating_System
4S	I-Operating_System
.	O
</s>
<s>
Absinthe	O
provides	O
an	O
"	O
untethered	O
"	O
jailbreak	B-Application
,	O
which	O
means	O
that	O
the	O
patched	O
device	O
can	O
be	O
rebooted	O
directly	O
into	O
a	O
jailbroken	B-Application
state	O
without	O
computer	O
assistance	O
(	O
or	O
,	O
as	O
with	O
a	O
semi-untethered	O
jailbreak	B-Application
,	O
without	O
requiring	O
an	O
application	O
to	O
be	O
launched	O
on	O
the	O
device	O
following	O
startup	O
,	O
in	O
order	O
to	O
reactivate	O
the	O
jailbreak	B-Application
exploit	O
)	O
.	O
</s>
<s>
It	O
incorporated	O
the	O
untether	O
exploit	O
called	O
Corona	O
that	O
pod2g	O
had	O
released	O
in	O
December	O
for	O
older	O
iOS	B-Application
devices	O
.	O
</s>
<s>
The	O
Next	O
Web	O
said	O
that	O
the	O
jailbreak	B-Application
took	O
a	O
long	O
time	O
to	O
be	O
released	O
,	O
and	O
VentureBeat	O
said	O
Absinthe	O
was	O
n't	O
as	O
easy	O
to	O
use	O
as	O
the	O
earlier	O
jailbreaking	B-Application
tool	O
JailbreakMe	B-Operating_System
.	O
</s>
<s>
According	O
to	O
iPhone	B-Application
Dev	I-Application
Team	I-Application
,	O
approximately	O
one	O
million	O
devices	O
were	O
newly	O
jailbroken	B-Application
in	O
the	O
three	O
days	O
after	O
Absinthe	O
's	O
release	O
.	O
</s>
<s>
The	O
developers	O
called	O
their	O
joint	O
effort	O
the	O
Jailbreak	B-Application
Dream	O
Team	O
,	O
which	O
Apple	O
credited	O
in	O
its	O
document	O
listing	O
security	O
patches	O
in	O
the	O
subsequent	O
version	O
of	O
iOS	B-Application
.	O
</s>
<s>
In	O
May	O
2012	O
,	O
developers	O
from	O
Chronic	O
Dev	B-Application
Team	I-Application
and	O
iPhone	B-Application
Dev	I-Application
Team	I-Application
released	O
Absinthe	O
2.0	O
(	O
for	O
OS	B-Operating_System
X	I-Operating_System
,	O
Windows	O
,	O
and	O
Linux	B-Application
)	O
,	O
which	O
can	O
jailbreak	B-Application
iOS	B-Application
5.1.1	O
untethered	O
on	O
all	O
iPhone	B-Operating_System
,	O
iPad	B-Operating_System
,	O
and	O
iPod	B-Device
Touch	I-Device
models	O
that	O
support	O
iOS	B-Application
5.1.1	O
,	O
including	O
jailbreaking	B-Application
the	O
third	B-Operating_System
generation	I-Operating_System
iPad	I-Operating_System
for	O
the	O
first	O
time	O
.	O
</s>
<s>
They	O
announced	O
it	O
at	O
the	O
Hack	O
In	O
The	O
Box	O
security	O
conference	O
in	O
Amsterdam	O
at	O
the	O
end	O
of	O
a	O
presentation	O
about	O
the	O
earlier	O
Absinthe	O
jailbreak	B-Application
,	O
and	O
it	O
did	O
not	O
initially	O
support	O
a	O
recently	O
released	O
model	O
of	O
iPad	B-Operating_System
2	I-Operating_System
.	O
</s>
<s>
According	O
to	O
Chronic	O
Dev	B-Application
Team	I-Application
,	O
approximately	O
one	O
million	O
devices	O
were	O
jailbroken	B-Application
over	O
the	O
weekend	O
after	O
its	O
Friday	O
release	O
.	O
</s>
<s>
PC	O
World	O
noted	O
that	O
devices	O
jailbroken	B-Application
with	O
tools	O
such	O
as	O
Absinthe	O
2.0	O
can	O
be	O
a	O
security	O
concern	O
for	O
companies	O
that	O
have	O
"	O
bring	O
your	O
own	O
device	O
"	O
policies	O
.	O
</s>
