CVE-2018-9840 Information

Description

The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening clicking on cancel and using the home button.

CVSS Vector

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

Reference

http://nint.en.do/Signal-Bypass-Screen-locker.php https://github.com/signalapp/Signal-iOS/commit/018a35df7b42b4941cb4dfc9f462b37c3fafd9e9 https://github.com/signalapp/Signal-iOS/commits/release/2.23.2

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.8