Headline
CVE-2023-48305: user_ldap app logs user passwords in the log file on level debug
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and Nextcloud Enterprise Server, when the log level was set to debug, the user_ldap app logged user passwords in plaintext into the log file. If the log file was then leaked or shared in any way the users’ passwords would be leaked. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.11, 26.0.6, and 27.1.0 contain a patch for this issue. As a workaround, change config setting loglevel to 1 or higher (should always be higher than 1 in production environments).
Package
Server (Nextcloud)
Affected versions
>= 25.0.0, >= 26.0.0, >= 27.0.0
Patched versions
25.0.11, 26.0.6, 27.1.0
Server (Nextcloud Enterprise)
>= 25.0.0, >= 26.0.0, >= 27.0.0
Description
Impact
When the log level was set to debug the user_ldap app logged user passwords in plaintext into the log file. If the log file was then leaked or shared in any way the users’ passwords would be leaked.
Patches
It is recommended that the Nextcloud Server is upgraded to 25.0.11, 26.0.6 or 27.1.0
It is recommended that the Nextcloud Enterprise Server is upgraded to 25.0.11, 26.0.6 or 27.1.0
Workarounds
- Change config setting loglevel to 1 or higher (should always be higher than 1 in production environments).
References
- HackerOne
- PullRequest
- Public ticket
For more information
If you have any questions or comments about this advisory:
- Create a post in nextcloud/security-advisories
- Customers: Open a support ticket at portal.nextcloud.com