<s>
Apache	B-Protocol
Guacamole	I-Protocol
is	O
a	O
free	B-License
and	I-License
open-source	I-License
,	O
cross-platform	B-Operating_System
,	O
clientless	O
remote	B-Protocol
desktop	I-Protocol
gateway	I-Protocol
maintained	O
by	O
the	O
Apache	O
Software	O
Foundation	O
.	O
</s>
<s>
It	O
allows	O
users	O
to	O
control	O
remote	B-Protocol
computers	I-Protocol
or	O
virtual	B-Architecture
machines	I-Architecture
via	O
a	O
web	B-Application
browser	I-Application
,	O
and	O
allows	O
administrators	O
to	O
dictate	O
how	O
and	O
whether	O
users	O
can	O
connect	O
using	O
an	O
extensible	O
authentication	O
and	O
authorization	O
system	O
.	O
</s>
<s>
Remote	O
access	O
is	O
performed	O
via	O
the	O
guacd	O
component	O
,	O
which	O
uses	O
the	O
RDP	B-Protocol
,	O
VNC	B-Protocol
or	O
SSH	B-Protocol
remote	O
protocols	O
to	O
access	O
resources	O
.	O
</s>
<s>
The	O
fact	O
that	O
the	O
client	O
runs	O
on	O
web	B-Application
browsers	I-Application
allows	O
users	O
to	O
connect	O
to	O
their	O
remote	B-Protocol
desktops	I-Protocol
without	O
installing	O
a	O
remote	B-Protocol
desktop	I-Protocol
client	O
.	O
</s>
<s>
Guacamole	O
is	O
made	O
up	O
of	O
multiple	O
components	O
:	O
a	O
web	B-Application
application	I-Application
that	O
is	O
served	O
to	O
users	O
,	O
and	O
a	O
backend	B-Architecture
service	O
(	O
"	O
guacd	O
"	O
)	O
that	O
dynamically	O
translates	O
and	O
optimizes	O
native	O
protocols	O
into	O
the	O
Guacamole	O
protocol	O
.	O
</s>
<s>
The	O
part	O
of	O
Guacamole	O
that	O
a	O
user	O
interacts	O
with	O
is	O
the	O
web	B-Application
application	I-Application
.	O
</s>
<s>
The	O
web	B-Application
application	I-Application
provides	O
the	O
user	O
interface	O
,	O
authentication	O
,	O
and	O
authorization	O
system	O
.	O
</s>
<s>
It	O
does	O
not	O
implement	O
any	O
remote	B-Protocol
desktop	I-Protocol
protocol	I-Protocol
,	O
but	O
instead	O
relies	O
on	O
guacd	O
to	O
translate	O
remote	B-Protocol
desktop	I-Protocol
protocols	I-Protocol
into	O
the	O
Guacamole	O
protocol	O
.	O
</s>
<s>
The	O
server	B-Application
side	I-Application
of	O
the	O
web	B-Application
application	I-Application
is	O
written	O
in	O
Java	B-Language
and	O
runs	O
beneath	O
a	O
servlet	O
container	O
like	O
Apache	B-Language
Tomcat	I-Language
or	O
Jetty	O
.	O
</s>
<s>
The	O
client	B-Operating_System
side	I-Operating_System
of	O
the	O
web	B-Application
application	I-Application
is	O
written	O
in	O
JavaScript	B-Language
and	O
runs	O
within	O
the	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
guacd	O
services	O
requests	O
to	O
connect	O
to	O
remote	B-Protocol
desktops	I-Protocol
from	O
the	O
web	B-Application
application	I-Application
.	O
</s>
<s>
It	O
dynamically	O
loads	O
support	O
for	O
remote	B-Protocol
desktop	I-Protocol
protocols	I-Protocol
so	O
that	O
neither	O
guacd	O
nor	O
the	O
web	B-Application
application	I-Application
need	O
to	O
understand	O
the	O
specifics	O
of	O
any	O
one	O
remote	B-Protocol
desktop	I-Protocol
protocol	I-Protocol
.	O
</s>
<s>
guacd	O
and	O
all	O
client	O
plugins	O
use	O
a	O
shared	O
library	O
,	O
libguac	O
,	O
to	O
abstract	O
away	O
the	O
Guacamole	O
protocol	O
and	O
communication	O
with	O
the	O
web	B-Application
application	I-Application
.	O
</s>
<s>
Guacamole	O
was	O
created	O
in	O
2010	O
by	O
Michael	O
Jumper	O
as	O
an	O
HTML5	O
VNC	B-Protocol
client	O
leveraging	O
components	O
of	O
a	O
browser-based	B-Application
telnet	O
client	O
called	O
"	O
RealMint	O
"	O
.	O
</s>
<s>
In	O
2017	O
,	O
Guacamole	O
completed	O
incubation	O
and	O
became	O
the	O
Apache	B-Protocol
Guacamole	I-Protocol
top-level	O
project	O
.	O
</s>
<s>
In	O
July	O
2020	O
,	O
a	O
pair	O
of	O
medium-severity	O
vulnerabilities	O
in	O
Guacamole	O
were	O
discovered	O
that	O
could	O
allow	O
an	O
attacker	O
that	O
had	O
already	O
compromised	O
an	O
RDP	B-Protocol
server	O
to	O
potentially	O
control	O
a	O
Guacamole	O
gateway	O
.	O
</s>
<s>
The	O
vulnerabilities	O
were	O
officially	O
patched	O
in	O
Apache	B-Protocol
Guacamole	I-Protocol
1.2.0	O
and	O
then	O
subsequently	O
announced	O
.	O
</s>
