advisories/nc-sa-2019-006.php


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    <h1>Security Advisory</h1>
    <a href="/security/advisories/">Back to advisories</a>
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        <h2>Bypass lock protection in Android app (NC-SA-2019-006)</h2>
        <p>26th July 2019</p>
        <p>Risk level: <strong>Low</strong></p>
        <p>CVSS v3 Base Score: 3.2 (<a href="https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N">AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N</a>)</p>
        <p>CWE: <a href="https://cwe.mitre.org/data/definitions/288.html">Authentication Bypass Using an Alternate Path or Channel (CWE-288)</a></p>
        <p>HackerOne report: <a href="https://hackerone.com/reports/331489">331489</a></p>
        <h3>Description</h3>
        <p>If an attacker has physical access to an Android smartphone without a screen lock, but with nextcloud installed and set up, they can easily access the nextcloud-files even if the nextcloud app is locked with a fingerprint or pin.</p>
        <h3>Affected Software</h3>
        <ul>
            <li>Nextcloud Android &lt; <strong>3.3.0</strong> (CVE-2019-5453)</li>

        </ul>
        <h3>Action Taken</h3>
        <p>The error has been fixed.</p>
        <h3>Resolution</h3>
        <p>It is recommended that users upgrade to version 3.3.0 or later.</p>
        <h3>Acknowledgements</h3>
        <p>The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:</p>
        <ul>
            <li>Volker Weißmann (volker.weissmann@gmx.de) - Vulnerability discovery and disclosure.</li>
        </ul>
        <br/>
        <small style="color:grey">This advisory is licensed <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</small>
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