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      <title>CVE-2021-20330 — Specific replication command with malformed oplog entries can crash secondaries</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2021-20330</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; MongoDB Inc. MongoDB Server, mongodb&lt;/p&gt;
&lt;p&gt;An attacker with basic CRUD permissions on a replicated collection can run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries. This issue affects MongoDB Server v4.0 versions prior to 4.0.27; MongoDB Server v4.2 versions prior to 4.2.16; MongoDB Server v4.4 versions prior to 4.4.9.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; MongoDB Inc. MongoDB Server, mongodb&lt;/p&gt;
&lt;p&gt;An attacker with basic CRUD permissions on a replicated collection can run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries. This issue affects MongoDB Server v4.0 versions prior to 4.0.27; MongoDB Server v4.2 versions prior to 4.2.16; MongoDB Server v4.4 versions prior to 4.4.9.&lt;/p&gt;</content:encoded>
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