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    <link>https://cve.radiocsirt.org</link>
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      <title>CVE-2022-36009 — Incorrect parsing of access level in gomatrixserverlib and dendrite</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2022-36009</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; matrix-org gomatrixserverlib&lt;/p&gt;
&lt;p&gt;gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `&amp;#34;events_default&amp;#34;` key of the `m.room.power_levels` event, defaulting the event default power level to zero in all cases. Power levels are the matrix terminology for user access level. In rooms where the `&amp;#34;events_default&amp;#34;` power level had been changed, this could result in events either being incorrectly authorised or rejected by Dendrite servers. gomatrixserverlib contains a fix as of commit `723fd49` and Dendrite 0.9.3 has been updated accordingly. Matrix rooms where the `&amp;#34;events_default&amp;#34;` power level has not been changed from the default of zero are not vulnerable. Users are advised to upgrade. There are no known workarounds for this issue.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; matrix-org gomatrixserverlib&lt;/p&gt;
&lt;p&gt;gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `&amp;#34;events_default&amp;#34;` key of the `m.room.power_levels` event, defaulting the event default power level to zero in all cases. Power levels are the matrix terminology for user access level. In rooms where the `&amp;#34;events_default&amp;#34;` power level had been changed, this could result in events either being incorrectly authorised or rejected by Dendrite servers. gomatrixserverlib contains a fix as of commit `723fd49` and Dendrite 0.9.3 has been updated accordingly. Matrix rooms where the `&amp;#34;events_default&amp;#34;` power level has not been changed from the default of zero are not vulnerable. Users are advised to upgrade. There are no known workarounds for this issue.&lt;/p&gt;</content:encoded>
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