CVE-2023-28999

medium

Description

Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files.​ This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8

https://github.com/nextcloud/desktop/pull/5560

https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf

Details

Source: Mitre, NVD

Published: 2023-04-04

Updated: 2023-11-07

Risk Information

CVSS v2

Base Score: 8

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:P

Severity: High

CVSS v3

Base Score: 6.4

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:L

Severity: Medium