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AUSCERT External Security Bulletin Redistribution
USN-4970-1: GUPnP vulnerability
2 June 2021
AusCERT Security Bulletin Summary
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Modify Arbitrary Files -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
CVE Names: CVE-2021-33516
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running GUPnP check for an updated version of the software for their
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USN-4970-1: GUPnP vulnerability
01 June 2021
GUPnP could allow unintended access to network services.
o Ubuntu 21.04
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o gupnp - framework for creating UPnP devices and control points
It was discovered that GUPnP incorrectly filtered local requests. If a user
were tricked into visiting a malicious website, a remote attacker could
possibly use this issue to perform actions against local UPnP services such
as obtaining or altering sensitive information.
The problem can be corrected by updating your system to the following package
o libgupnp-1.2-0 - 1.2.4-1ubuntu0.21.04.1
o libgupnp-1.2-0 - 1.2.4-1ubuntu0.20.10.1
o libgupnp-1.2-0 - 1.2.3-0ubuntu0.20.04.2
After a standard system update you need to reboot your computer to make all
the necessary changes.
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