TigerVNC accessible via the network and not just via a UNIX socket as intended

Description

Summary

jupyter-remote-desktop-proxy was meant to rely on UNIX sockets readable only by the current user since version 3.0.0, but when used with TigerVNC, the VNC server started by jupyter-remote-desktop-proxy were still accessible via the network.

This vulnerability does not affect users having TurboVNC as the vncserver executable.

Credits

This vulnerability was identified by Arne Gottwald at University of Göttingen and analyzed, reported, and reviewed by @frejanordsiek.

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2025-04-12 03:42:31 UTC
Updated
2025-04-15 12:49:07 UTC
GitHub reviewed
2025-04-12 03:42:31 UTC
NVD published
2025-04-14

EPSS Score

Score Percentile
0.16% 36.52%

CVSS Scores

Base score Version Severity Vector
9.0 4.0
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Click to expand
Attack vector (AV:A)
Attacker has to be on an adjacent/local network segment.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:P)
Additional preconditions must be present for exploitation.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:H)
High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:H)
High integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:H)
High confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:H)
High integrity impact on subsequent systems.
Subsequent system availability impact (SA:H)
High availability impact on subsequent systems.

Identifiers

CWEs

CWE id Name
CWE-668 Exposure of Resource to Wrong Sphere

Credits

  • frejanordsiek (analyst)
  • consideRatio (remediation_developer)
  • minrk (remediation_reviewer)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
pip jupyter-remote-desktop-proxy = 3.0.0 3.0.1

References

cvelogic Threat Intelligence