Nextcloud Android Client is the Android client for Nextcloud. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.16.1, the Nextcloud Android client skipped a step that involved the client checking if a private key belonged to a previously downloaded public certificate. If the Nextcloud instance served a malicious public key, the data would be encrypted for this key and thus could be accessible to a malicious actor. The vulnerability is patched in version 3.16.1. As a workaround, do not add additional end-to-end encrypted devices to a user account.
References
Link | Resource |
---|---|
https://github.com/nextcloud/android/pull/8438 | Third Party Advisory |
https://github.com/nextcloud/end_to_end_encryption_rfc/blob/7f002996397faefb664019a97ebb0a1e210f64f0/RFC.md#further-devices | Third Party Advisory |
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5v33-r9cm-7736 | Third Party Advisory |
https://hackerone.com/reports/1189162 | Permissions Required |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-07-12T20:40:13
Updated: 2021-07-12T20:40:13
Reserved: 2021-05-12T00:00:00
Link: CVE-2021-32727
JSON object: View
NVD Information
Status : Analyzed
Published: 2021-07-12T21:15:07.817
Modified: 2021-07-14T13:23:23.410
Link: CVE-2021-32727
JSON object: View
Redhat Information
No data.
CWE