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    <title>MongoDB Jira</title>
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    <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-44111] Assert BSON object size is valid while copying</title>
                <link>https://jira.mongodb.org/browse/SERVER-44111</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b9c13fa15b7e58add2c8618b77ca86431cf24408/src/mongo/bson/bsonobj.cpp#L101&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;copy() function for BSONObj&lt;/a&gt; could detect corrupt BSON and detect undefined behavior earlier for two reasons:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;There is no verification that objsize() is below the maximum BSON size. An attempt to allocate a new buffer based on the size of an unowned BSON object can lead to very large allocations.&lt;/li&gt;
	&lt;li&gt;By making 2 calls to &lt;tt&gt;objsize()&lt;/tt&gt;, the copy function may allocate a different amount of memory than it writes if the underlying buffer is unowned. This should also be fixed to prevent the possibility of undefined behavior.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="973213">SERVER-44111</key>
            <summary>Assert BSON object size is valid while copying</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="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="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="louis.williams@mongodb.com">Louis Williams</reporter>
                        <labels>
                    </labels>
                <created>Fri, 18 Oct 2019 18:51:38 +0000</created>
                <updated>Sun, 29 Oct 2023 22:15:56 +0000</updated>
                            <resolved>Tue, 22 Oct 2019 18:40:53 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2493636" author="xgen-internal-githook" created="Mon, 21 Oct 2019 22:21:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Louis Williams&apos;, &apos;username&apos;: &apos;louiswilliams&apos;, &apos;email&apos;: &apos;louis.williams@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44111&quot; title=&quot;Assert BSON object size is valid while copying&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44111&quot;&gt;&lt;del&gt;SERVER-44111&lt;/del&gt;&lt;/a&gt; Assert BSONObj size is valid while copying&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5b749ef0105d92a2a3318c01d622f25201cd7bb8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5b749ef0105d92a2a3318c01d622f25201cd7bb8&lt;/a&gt;&lt;/p&gt;</comment>
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