cve-2021-32727
Vulnerability from cvelistv5
Published
2021-07-12 20:40
Modified
2024-08-03 23:33
Severity ?
5.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Summary
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
security-advisories@github.comhttps://github.com/nextcloud/android/pull/8438Third Party Advisory
security-advisories@github.comhttps://github.com/nextcloud/end_to_end_encryption_rfc/blob/7f002996397faefb664019a97ebb0a1e210f64f0/RFC.md#further-devicesThird Party Advisory
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-5v33-r9cm-7736Third Party Advisory
security-advisories@github.comhttps://hackerone.com/reports/1189162Permissions Required
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/android/pull/8438Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/end_to_end_encryption_rfc/blob/7f002996397faefb664019a97ebb0a1e210f64f0/RFC.md#further-devicesThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5v33-r9cm-7736Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1189162Permissions Required
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 3.16.1
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