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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
    </build-info>


<item>
            <title>[SERVER-75651] Exhaustively identify internal namespaces that should not be modified by user commands</title>
                <link>https://jira.mongodb.org/browse/SERVER-75651</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Periodically a new SERVER ticket pops up where fuzz testing has messed up internal namespace state via drop/rename/etc.&lt;/p&gt;

&lt;p&gt;We should explore creating a new auth role/permission for internal namespaces &amp;#8211; so that downstream products can still modify internal collections as necessary &amp;#8211; and labeling internal namespaces such that they can be identified as such.&lt;/p&gt;

&lt;p&gt;Perhaps we can add a tag/field to NamespaceString for internal collection identification. And then create a list of commands (maybe via a test) that are not allowed to modify internal collections.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2306472">SERVER-75651</key>
            <summary>Exhaustively identify internal namespaces that should not be modified by user commands</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Tue, 4 Apr 2023 16:02:30 +0000</created>
                <updated>Wed, 13 Dec 2023 15:37:32 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="5602114" author="connie.chen" created="Mon, 31 Jul 2023 15:07:39 +0000"  >&lt;p&gt;We should ensure we include the Security team to consult on how this interacts with the authorization system&lt;/p&gt;</comment>
                            <comment id="5551167" author="dianna.hohensee" created="Fri, 7 Jul 2023 17:38:50 +0000"  >&lt;p&gt;Re-assigning to the backlog. The next steps here, agreed on in triage meeting, are basically to try implementing what I proposed.&lt;/p&gt;</comment>
                            <comment id="5524430" author="dianna.hohensee" created="Mon, 26 Jun 2023 12:39:14 +0000"  >&lt;p&gt;We need some mechanism to ensure engineers enumerate command prohibitions / access control whenever a new internal namespace is created. But at the same time, there&apos;s no need to pass that around with NamespaceString instances, so the system has to be alongside somehow. &lt;b&gt;Maybe a lint rule could be created to pick up whenever engineers create a new namespace without specifying access control.&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;First code idea that came to mind:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;enum class AccessControl {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    kDrop,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    kCreate,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    kRename,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    kWrite,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    .... // define enum per command requiring namespace access control&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// isRestoreRepairAuthorized  is provided by the caller and represents AuthorizationSession::get(opCtx-&amp;gt;getClient())-&amp;gt;isAuthorizedForActionsOnResource(.....)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;NamespaceString::accessAllowed(OperationContext* opCtx, NamespaceString::AccessControl operation, bool isRestoreRepairAuthorized) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    // Check coll() is not disallowed.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    if (operation == NamespaceString::AccessControl::kDrop) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        if (isRestoreRepairAuthorized) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            // check namespaces always disallowed.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        } else {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            // check namespaces always disallowed and access controlled.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    } else if (operation == NamespaceString::AccessControl::kCreate) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        // ....&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    } else if (operation == NamespaceString::AccessControl::kRename) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        // ....&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    } else ....&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="5521929" author="dianna.hohensee" created="Fri, 23 Jun 2023 17:56:33 +0000"  >&lt;p&gt;After thinking about this some more, I think there are two categories of namespaces:&lt;/p&gt;

&lt;p&gt;1) Namespaces to which we would like to limit access, essentially allow only repair/restore type operations to alter.&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;For example, when sharding is enabled (and commands go through the sharding layer) we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/s/rename_collection_coordinator.cpp#L528-L534&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;disallow modifications renaming certain internal sharding collections like this&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;Also, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-76282&quot; title=&quot;Ban user writes to implicitly replicated collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76282&quot;&gt;&lt;del&gt;SERVER-76282&lt;/del&gt;&lt;/a&gt;&apos;s attempted to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/73170a0dcbf93067a857bf6f193874183052d765/src/mongo/db/namespace_string.cpp#L411-L420&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;disallow user access to implicitly replicated collections&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;Max pointed me at the &lt;a href=&quot;https://github.com/10gen/jstestfuzz/blob/f436c414a3a43c1211d05a72a83229d7bf83b31b/src/fuzzers/mutational/preamble/preamble.rollup.js#L203&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mutational fuzzer code in which writes to many collections are prohibited&lt;/a&gt;, reflecting collections to which we would want to limit access.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;2) Namespaces to which we allow no access.&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;For example &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/catalog/drop_collection.cpp#L729-L762&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;drop collection that does not allow drop of certain internal collections&lt;/a&gt; ever.&lt;/li&gt;
	&lt;li&gt;And &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/catalog/rename_collection.cpp#L844-L906&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;rename collection prohibits certain collections as well &lt;/a&gt;.&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/fec9a7e7833d648e73174d64072ee4e94f738fcd/src/mongo/db/s/rename_collection_coordinator.cpp#L570-L611&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Sharding rename collection also disallows namespaces&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;We&apos;re much stricter with drop/rename than regular writes to internal collections, internationally or not. Today we do a lot of checks via NamespaceString helpers, grouping similarly treated namespaces into helper functions and then checking for and taking action on those namespaces in various command paths.&lt;/p&gt;</comment>
                            <comment id="5373814" author="geert.bosch" created="Tue, 25 Apr 2023 14:42:59 +0000"  >&lt;p&gt;Thanks for your insights Max, I agree with your summary. I&apos;d like the fuzzer to run with access control instead of a list of exceptions, as  that seems less error-prone and actually allows us to catch cases where there are errors in access control.&lt;/p&gt;</comment>
                            <comment id="5373749" author="max.hirschhorn@10gen.com" created="Tue, 25 Apr 2023 14:31:34 +0000"  >&lt;blockquote&gt;
&lt;p&gt;We should explore creating a new auth role/permission for internal namespaces&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;I had discussed this ticket a little with Andy after also seeing &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-76282&quot; title=&quot;Ban user writes to implicitly replicated collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76282&quot;&gt;&lt;del&gt;SERVER-76282&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74679&quot; title=&quot;mongos allows for rename of config db collections on config shard&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74679&quot;&gt;&lt;del&gt;SERVER-74679&lt;/del&gt;&lt;/a&gt; go by jira&amp;#45;server&amp;#45;new. We&apos;re both in favor of pursuing solutions (if any change is to be made) which use the access control system.&lt;/p&gt;

&lt;p&gt;It wasn&apos;t clear to me from reading this ticket if the mutational (jstestfuzz) fuzzer is the primary motivation or not. My personal view is that it must be possible for a human to manually remediate a collection with direct writes in both a replicated context (&amp;#45;&amp;#45;replSet) and a non&amp;#45;replicated context (standalone mongod). Absolute restrictions unconditionally enforced in C++ code would otherwise mean an operator in a dire situation is limited in how they can recover or, sometimes more importantly, how quickly they can recover.&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;Periodically a new SERVER ticket pops up where fuzz testing has messed up internal namespace state via drop/rename/etc.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;The mutational (jstestfuzz) fuzzer has a framework for prohibiting certain operations. Many internal namespaces are already part of the list. It is straightforward to enumerate and add others. We could also look into having the jstestfuzz&amp;#42; Evergreen tasks run with the access control system enabled if that would lower the maintenance burden on Server engineers as new internal namespaces are introduced.&lt;/p&gt;</comment>
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