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    <title>MongoDB Jira</title>
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    <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-27298] Some argument parsing silently truncates at NUL bytes</title>
                <link>https://jira.mongodb.org/browse/SERVER-27298</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A few options in mongod_options.cpp (such as &quot;replication.replSetName&quot;) call std::string.c_str() then passes the result to a function that takes a std::string. This appears to be unintentional, but has the impact of silently truncating the option at the first &lt;tt&gt;\0&lt;/tt&gt; byte. I don&apos;t think it is possible to pass embedded NUL bytes on the command line so it requires a config file. Example config file:&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;



&lt;p&gt;I see a few possible options:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Remove the c_str() and start including the NUL byte. Maybe also add validation with allowed characters in replSet names.&lt;/li&gt;
	&lt;li&gt;Error if there is a NUL byte.&lt;/li&gt;
	&lt;li&gt;Decide this is intentional and add a comment explaining it. We should also look at arguments without a c_str() and decide if they should also truncate.&lt;/li&gt;
	&lt;li&gt;Decide that no options in the config file should support NUL bytes and error in the main options parser logic.&lt;/li&gt;
&lt;/ol&gt;

</description>
                <environment></environment>
        <key id="336725">SERVER-27298</key>
            <summary>Some argument parsing silently truncates at NUL bytes</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="ted.tuckman@mongodb.com">Ted Tuckman</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                            <label>neweng</label>
                            <label>platforms-interns-2017</label>
                    </labels>
                <created>Tue, 6 Dec 2016 16:45:37 +0000</created>
                <updated>Wed, 6 Dec 2017 21:12:08 +0000</updated>
                            <resolved>Thu, 22 Jun 2017 17:21:14 +0000</resolved>
                                                    <fixVersion>3.5.10</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1604421" author="xgen-internal-githook" created="Thu, 22 Jun 2017 17:14:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;TedTuckman&apos;, u&apos;name&apos;: u&apos;Ted Tuckman&apos;, u&apos;email&apos;: u&apos;ted.tuckman@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27298&quot; title=&quot;Some argument parsing silently truncates at NUL bytes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27298&quot;&gt;&lt;del&gt;SERVER-27298&lt;/del&gt;&lt;/a&gt; Options Parser now rejects null bytes in all cases&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dba32749903786dce9ab45b7aaf6ae0fffef0501&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dba32749903786dce9ab45b7aaf6ae0fffef0501&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1450358" author="milkie" created="Tue, 6 Dec 2016 16:47:40 +0000"  >&lt;p&gt;I vote number 4.&lt;/p&gt;</comment>
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