CVE-2021-32727 — End-to-end encryption device setup did not verify public key

描述

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.

如何修補 CVE-2021-32727

要修補 CVE-2021-32727,請將受影響套件升級到下列已修補版本。

—升級至 3.16.1 或更新版本

CVE-2021-32727 正在被利用嗎?

低 — EPSS 為 0.7%,目前沒有觀察到大規模利用活動。

受影響套件(1)

from 0, < 3.16.1