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Gentoo Linux Security Advisory 202411-01

Gentoo Linux Security Advisory 202411-1 - A vulnerability has been discovered in Neat VNC, which can lead to authentication bypass. Versions greater than or equal to 0.8.1 are affected.

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Gentoo Linux Security Advisory GLSA 202411-01

                                       https://security.gentoo.org/

Severity: High
Title: Neat VNC: Authentication Bypass
Date: November 06, 2024
Bugs: #937140
ID: 202411-01

Synopsis

A vulnerability has been discovered in Neat VNC, which can lead to
authentication bypass.

Background

Neat VNC is a liberally licensed VNC server library that’s intended to
be fast and neat.

Affected packages

Package Vulnerable Unaffected

gui-libs/neatvnc < 0.8.1 >= 0.8.1

Description

Neat VNC allows remote attackers to bypass authentication via a request
in which the client specifies an insecure security type such as "Type 1

None", which is accepted even if it is not offered by the server, as
originally demonstrated using a long password.

Impact

A remote attacker can opt not to use any authentication method and
access the VNC server.

Workaround

There is no known workaround at this time.

Resolution

All Neat VNC users should upgrade to the latest version:

emerge --sync

emerge --ask --oneshot --verbose “>=gui-libs/neatvnc-0.8.1”

References

Availability

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202411-01

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users’ machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.