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Merge pull request #1277 from Zash/xep-0223-check-event-origin

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xep-0223: Add origin checking to security considerations
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Kevin Smith 2023-05-04 14:30:24 +01:00 committed by GitHub
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xep-0223.xml
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@ -25,6 +25,12 @@
<supersededby/> <supersededby/>
<shortname>N/A</shortname> <shortname>N/A</shortname>
&stpeter; &stpeter;
<revision>
<version>1.1.1</version>
<date>2023-03-23</date>
<initials>ka</initials>
<remark><p>Add notes about checking event origin (in reaction to CVE-2023-28686).</p></remark>
</revision>
<revision> <revision>
<version>1.1</version> <version>1.1</version>
<date>2018-03-28</date> <date>2018-03-28</date>
@ -245,6 +251,7 @@
<section1 topic='Security Considerations' anchor='security'> <section1 topic='Security Considerations' anchor='security'>
<p>Since private data is to be stored in a mechanism originally intended to <em>publish</em> data, it is REQUIRED for entities to ensure that the restrictive &lt;publish-options/&gt; will actually be honored by the server by performing the feature discovery procedure as specified in <link url='#support'>Determining Support</link>. If an entity using that procedure finds that the server does not support &lt;publish-options/&gt;, it MUST NOT store private data in PubSub, unless it can ensure privacy of the data with other means.</p> <p>Since private data is to be stored in a mechanism originally intended to <em>publish</em> data, it is REQUIRED for entities to ensure that the restrictive &lt;publish-options/&gt; will actually be honored by the server by performing the feature discovery procedure as specified in <link url='#support'>Determining Support</link>. If an entity using that procedure finds that the server does not support &lt;publish-options/&gt;, it MUST NOT store private data in PubSub, unless it can ensure privacy of the data with other means.</p>
<p>The configuration of a local pubsub node does not prevent an attacker or a contact with a misconfigured node from sending pubsub events with the same payload. Therefore clients MUST verify that the ‘from’ attribute on incoming event messages is either absent or equal to their own account JID.</p>
<p>The Security Considerations specified in <cite>XEP-0060</cite> and <cite>XEP-0163</cite> need to be taken into account.</p> <p>The Security Considerations specified in <cite>XEP-0060</cite> and <cite>XEP-0163</cite> need to be taken into account.</p>
</section1> </section1>