CVE-2021-32801 Exceptions may have logged Encryption-at-Rest key content in Nextcloud server

Medium 5.5 Published 7 Sep 2021 Updated 3 Aug 2024

Attackers with log access can read encryption keys if Encryption-at-Rest is enabled and exceptions are logged, compromising data confidentiality.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2021-32801?

CVE-2021-32801 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 7 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Nextcloud server is an open source, self hosted personal cloud. In affected versions logging of exceptions may have resulted in logging potentially sensitive key material for the Nextcloud Encryption-at-Rest functionality. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. If upgrading is not an option users are advised to disable system logging to resolve this issue until such time that an upgrade can be performed Note that ff you do not use the Encryption-at-Rest functionality of Nextcloud you are not affected by this bug.

Weakness: CWE-532

Which versions are affected by CVE-2021-32801?

It affects 1 product.

Products include Nextcloud Nextcloud Server.

How do I fix CVE-2021-32801?

Upgrade to a fixed version.

Is CVE-2021-32801 being exploited?

There is no known exploitation of CVE-2021-32801 in the wild and no public exploit code.

All Nextcloud Nextcloud Server vulnerabilities

Sources

Also known as GHSA-mcpf-v65v-359h.