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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>[CDRIVER-3585] Wrong length allocated for output string of MultiByteToWideChar</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-3585</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;MultiByteToWideChar documents:&lt;/p&gt;
&lt;blockquote&gt;
&lt;p&gt;Calling this function can easily cause a buffer overrun because the size of the input buffer indicated by lpMultiByteStr equals the number of bytes in the string, while the size of the output buffer indicated by lpWideCharStr equals the number of characters.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;In &lt;tt&gt;mongoc_secure_channel_setup_crl&lt;/tt&gt; it appears we have the same issue:&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;
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						&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;   str = (LPWSTR) bson_malloc0 (chars);&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;   MultiByteToWideChar (CP_ACP, 0, opt-&amp;gt;crl_file, -1, str, chars);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;
&lt;p&gt;This allocates &lt;tt&gt;chars&lt;/tt&gt; bytes, but should be allocating &lt;tt&gt;chars&lt;/tt&gt; number of &lt;tt&gt;wchar_t&lt;/tt&gt; (2 bytes each).&lt;/p&gt;

&lt;p&gt;This was discovered when manually testing the &lt;tt&gt;crl_file&lt;/tt&gt; on Windows to document how OCSP interacts with the &lt;tt&gt;crl_file&lt;/tt&gt; option.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1286733">CDRIVER-3585</key>
            <summary>Wrong length allocated for output string of MultiByteToWideChar</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="13201">Fixed</resolution>
                                        <assignee username="kevin.albertson@mongodb.com">Kevin Albertson</assignee>
                                    <reporter username="kevin.albertson@mongodb.com">Kevin Albertson</reporter>
                        <labels>
                    </labels>
                <created>Mon, 23 Mar 2020 17:47:02 +0000</created>
                <updated>Sat, 28 Oct 2023 11:28:51 +0000</updated>
                            <resolved>Tue, 24 Mar 2020 13:04:39 +0000</resolved>
                                                    <fixVersion>1.17.0-beta</fixVersion>
                    <fixVersion>1.17.0</fixVersion>
                                    <component>tls</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2993939" author="xgen-internal-githook" created="Tue, 24 Mar 2020 12:48:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kevin Albertson&apos;, &apos;username&apos;: &apos;kevinAlbs&apos;, &apos;email&apos;: &apos;kevin.albertson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-3585&quot; title=&quot;Wrong length allocated for output string of MultiByteToWideChar&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-3585&quot;&gt;&lt;del&gt;CDRIVER-3585&lt;/del&gt;&lt;/a&gt; fix crl_file str conversion for schannel&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/359cf9b1789dba85e49ea9ef9e38d41df96bede2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/359cf9b1789dba85e49ea9ef9e38d41df96bede2&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1286737">CDRIVER-3586</issuekey>
        </issuelink>
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