CVE-2022-39339: Cleartext Transmission of Sensitive Information in user_oidc
useroidc is an OpenID Connect user backend for Nextcloud. In versions prior to 1.2.1 sensitive information such as the OIDC client credentials and tokens are sent in plain text of HTTP without TLS. Any malicious actor with access to monitor user traffic may have been able to compromise account security. This issue has been addressed in in useroidc v1.2.1. Users are advised to upgrade. Users unable to upgrade may use https to access Nextcloud. Set an HTTPS discovery URL in the provider settings (in Nextcloud OIDC admin settings).
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2022-39339?
CVE-2022-39339 is considered a high-severity vulnerability due to the exposure of sensitive information over unencrypted HTTP.
How do I fix CVE-2022-39339?
To mitigate CVE-2022-39339, upgrade the OpenID Connect user backend for Nextcloud to version 1.2.1 or later.
What information is leaked in CVE-2022-39339?
CVE-2022-39339 exposes sensitive OIDC client credentials and tokens transmitted in plain text.
Who is affected by CVE-2022-39339?
Users of the Nextcloud OpenID Connect user backend prior to version 1.2.1 are affected by CVE-2022-39339.
What can attackers do with CVE-2022-39339?
Attackers can intercept and compromise sensitive authentication tokens and credentials by monitoring unencrypted network traffic.