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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-23723] LDAP Authorization on Linux with GSSAPI requires RDNS resolution to round robined LDAP servers</title>
                <link>https://jira.mongodb.org/browse/SERVER-23723</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Because Active Directory Domain Controllers are responsible for a whole domain, the domain name will resolve them presumably round robin. By default, the domain does not have an SPN pointing to an LDAP server. This means, when OpenLDAP receives a referral to a subdomain in the forest, it will use the domain name to connect to a server which hosts the domain, and will be unable to GSSAPI bind to the server. This can be corrected by setting up PTR entries from each DC&apos;s IP address back to the correct hostname.&lt;/p&gt;

&lt;p&gt;The Windows LDAP API does not require this. It seems likely that it performs a query for the RootDSE, to acquire the DNS name the server believe it operates under. Alternatively, it might be performing an SRV lookup of some kind. Either way, this suggests that reverse DNS resolvability might not be guaranteed in Windows environments. As such, the Linux LDAP authorization subsystem should try to operate in these conditions as well.&lt;/p&gt;</description>
                <environment></environment>
        <key id="279752">SERVER-23723</key>
            <summary>LDAP Authorization on Linux with GSSAPI requires RDNS resolution to round robined LDAP servers</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-security">Backlog - Security Team</assignee>
                                    <reporter username="spencer.jackson@mongodb.com">Spencer Jackson</reporter>
                        <labels>
                            <label>ldap</label>
                    </labels>
                <created>Thu, 14 Apr 2016 17:58:49 +0000</created>
                <updated>Tue, 6 Dec 2022 04:28:04 +0000</updated>
                                                                            <component>Security</component>
                                        <votes>1</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1814979" author="spencer.jackson@10gen.com" created="Fri, 23 Feb 2018 23:24:13 +0000"  >&lt;p&gt;It turns out the GSSAPI_ALLOW_REMOTE_PRINCIPAL flag only has an effect when libldap is compiled with the GSSAPI module. The configure flag to make libldap compile the GSSAPI module has been removed since 2009.&lt;/p&gt;</comment>
                            <comment id="1285144" author="spencer.jackson@10gen.com" created="Mon, 6 Jun 2016 15:46:32 +0000"  >&lt;p&gt;I suspect this isn&apos;t as necessary as I initially believed. There appears to be a libldap configuration option which should allow it to do this for us. From the man pages:&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;       GSSAPI_ALLOW_REMOTE_PRINCIPAL &amp;lt;on/true/yes/off/false/no&amp;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;              Specifies if GSSAPI based authentication should try to form&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;              the target principal name out of the ldapServiceName or&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;              dnsHostName attribute of the targets RootDSE entry. The&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;              default is off.&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;This could still be valuable, but we should wait to see if there&apos;s demand first.&lt;/p&gt;</comment>
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