Why is the xhost program considered dangerous to use?

The correct answer is B. It allows easy access to your X server by other users. See the full explanation below for the reasoning.

Question

Why is the xhost program considered dangerous to use?

Options

AIt makes it difficult to uniquely identify a computer on the network.
BIt allows easy access to your X server by other users.
CIt logs sensitive information to syslog.
DIt makes your computer share network resources without any authentication.
EIt is a graphical DNS tool with known exploits.

How the community answered

(31 responses)

A
3% (1)
B
71% (22)
C
16% (5)
D
6% (2)
E
3% (1)

Community Discussion

Hiroshi T.Mar 4, 2026

B is correct. The xhost program controls access to the X display server, and using it carelessly (especially xhost + to allow all hosts) grants any user on the network the ability to connect to your X server, which means they can capture keystrokes, read screen contents, and inject input into your graphical session with no authentication required.

Prof. SaraFeb 19, 2026

I initially gravitated toward D because "no authentication" sounds like the classic security horror story, but D describes anonymous file sharing, not X access. The pivot came when I remembered what xhost actually does: it disables X server access control entirely, meaning any user on any listed host can connect to your display and do whatever they want with your GUI session, which is exactly what B states.

Anjali D.Feb 25, 2026

Saw this one on my actual exam and almost second-guessed myself because D sounds scary too, but the answer is B, xhost allows other users to connect to your X server without needing to authenticate at all, which means anyone on the network can potentially display or intercept your graphical applications. Once I remembered that xhost basically opens the door with no lock, it clicked.

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