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Mandatory encryption at rest can be bypassed (UI)

High
sebastian-wire published GHSA-h4m7-pr8h-j7rf Oct 4, 2021

Package

Wire by Bund (iOS)

Affected versions

3.68

Patched versions

3.70

Description

Impact

Users of Wire by Bund may bypass the mandatory encryption at rest feature by simply disabling their device passcode. Upon launching, the app will attempt to enable encryption at rest by generating encryption keys via the Secure Enclave, however it will fail silently if no device passcode is set. The user has no indication that encryption at rest is not active since the feature is hidden to them.

Patches

Log out the user when the creation of encryptions keys fails and show an error message.

Workarounds

Ensure that the device passcode is set, perhaps through Mobile Device Management tools?

Severity

High

CVE ID

CVE-2021-41094

Weaknesses

No CWEs