CVE-2018-9840

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    CVE-2018-9840

    Published: 10 Apr 2018Last Modified: 8 Jul 2026

    Summary:

    Details: 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.

    References: 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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -2264edd9ded7212c7a336a835861385d5f9774c7

    Affected versions

    2.23.1.2
    2.23.1.1
    2.23.1.0
    2.23.0.14
    2.23.0.13
    2.23.0.12
    2.23.0.11
    2.23.0.10
    2.23.0.9
    2.23.0.8
    2.23.0.7
    2.23.0.6
    2.23.0.5
    2.23.0.4
    2.23.0.3
    2.23.0.2
    2.23.0.1
    2.23.0.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2018-9840 | CVE-DB