blob: 8b47092dca6dd3a1bdb55548751da64a4d19923f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
<div class="row page-content-header">
<div class="col-md-12">
<h1>Security Advisory</h1>
<a href="/security/advisories/">Back to advisories</a>
</div>
</div>
<div class="row">
<div class="col-md-12">
<h2>Improper confidentiality protection of server-side encryption keys (NC-SA-2020-040)</h2>
<p>3rd October 2020</p>
<p>Risk level: <strong>Low</strong></p>
<p>CVSS v3 Base Score: 5.3 (<a href="https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N">AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N</a>)</p>
<p>CWE: <a href="https://cwe.mitre.org/data/definitions/522.html">Insufficiently Protected Credentials (CWE-522)</a></p>
<p>HackerOne report: <a href="https://hackerone.com/reports/743505">743505</a></p>
<h3>Description</h3>
<p>Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the public key to decrypt them later on.</p>
<h3>Affected Software</h3>
<ul>
<li>Nextcloud Server < <strong>20.0.0</strong> (CVE-2020-8152)</li>
</ul>
<h3>Action Taken</h3>
<p>The error has been fixed.</p>
<h3>Resolution</h3>
<p>It is recommended that the Nextcloud Server is upgraded to 20.0.0.</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><a href="https://www.syseleven.de/" target="_blank" rel="noreferrer">Kevin "Kenny" Niehage - SysEleven GmbH (kenny@syseleven.de) - Vulnerability discovery and disclosure.</a></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>
</div>
</div>
|