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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>
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<item>
            <title>[SERVER-50170] Fix server selection failure on mongos</title>
                <link>https://jira.mongodb.org/browse/SERVER-50170</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;div class=&quot;panel&quot; style=&quot;background-color: #eeeeee;border-color: #cccccc;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;border-bottom-color: #cccccc;background-color: #6cb33f;&quot;&gt;&lt;b&gt;CVE-2020-7926&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #eeeeee;&quot;&gt;
&lt;p&gt;&lt;ins&gt;&lt;b&gt;Title:&lt;/b&gt;&lt;/ins&gt;&#160;Specific query can cause a DoS against MongoDB Server&lt;/p&gt;

&lt;p&gt;&lt;ins&gt;&lt;b&gt;Description:&lt;/b&gt;&lt;/ins&gt;&lt;/p&gt;

&lt;p&gt;A user authorized to perform database queries may cause denial of service by issuing a specially crafted query which violates an invariant in the server selection subsystem. This issue affects: MongoDB Server version 4.4 prior to 4.4.1. Versions before 4.4 are not affected.&#160;&lt;/p&gt;

&lt;p&gt;&lt;ins&gt;&lt;b&gt;CVSS score:&lt;/b&gt;&lt;/ins&gt;&#160;6.5&lt;/p&gt;

&lt;p&gt;Using the following scoring metrics:&lt;br/&gt;
&lt;em&gt;AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;&lt;ins&gt;&lt;b&gt;CWE:&lt;/b&gt;&lt;/ins&gt;&#160;&apos;CWE-755: Improper Handling of Exceptional Conditions&apos;.&lt;/p&gt;

&lt;p&gt;&lt;ins&gt;&lt;b&gt;Affected versions:&lt;/b&gt;&lt;/ins&gt;&lt;/p&gt;

&lt;p&gt;This issue affects -&#160;MongoDB Inc. MongoDB Server:&lt;/p&gt;

&lt;p&gt;v4.4 versions prior to 4.4.1&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;&#8212;&lt;/p&gt;

&lt;p&gt;Due to a bug in the query planner it&apos;s possible to trip &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8010c51d3f1cc1020959f8b351f8242d141d42a3/src/mongo/db/query/index_bounds_builder.cpp#L450&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt; invariant for certain types of queries.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1434443">SERVER-50170</key>
            <summary>Fix server selection failure on mongos</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="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="lamont.nelson@mongodb.com">Lamont Nelson</assignee>
                                    <reporter username="lamont.nelson@mongodb.com">Lamont Nelson</reporter>
                        <labels>
                            <label>KP44</label>
                    </labels>
                <created>Fri, 7 Aug 2020 00:00:28 +0000</created>
                <updated>Sun, 29 Oct 2023 22:04:43 +0000</updated>
                            <resolved>Mon, 17 Aug 2020 18:28:21 +0000</resolved>
                                                    <fixVersion>4.4.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="3343003" author="xgen-internal-githook" created="Mon, 17 Aug 2020 18:15:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;LaMont Nelson&apos;, &apos;email&apos;: &apos;lamont.nelson@mongodb.com&apos;, &apos;username&apos;: &apos;lamontnelson&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50170&quot; title=&quot;Fix server selection failure on mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50170&quot;&gt;&lt;del&gt;SERVER-50170&lt;/del&gt;&lt;/a&gt; fix max staleness read preference parameter for server selection&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 75f7184eafa78006a698cda4c4adfb57f1290047)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/859ec65c84f201e7aa687865633a2fa34e318174&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/859ec65c84f201e7aa687865633a2fa34e318174&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3340679" author="xgen-internal-githook" created="Fri, 14 Aug 2020 22:15:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;LaMont Nelson&apos;, &apos;email&apos;: &apos;lamont.nelson@mongodb.com&apos;, &apos;username&apos;: &apos;lamontnelson&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50170&quot; title=&quot;Fix server selection failure on mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50170&quot;&gt;&lt;del&gt;SERVER-50170&lt;/del&gt;&lt;/a&gt; fix max staleness read preference parameter for server selection&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/75f7184eafa78006a698cda4c4adfb57f1290047&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/75f7184eafa78006a698cda4c4adfb57f1290047&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1745204">SERVER-57136</issuekey>
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            <issuekey id="1769284">SERVER-57451</issuekey>
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