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    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-46630] RemoveSaver writes GCM tag to incorrect file position</title>
                <link>https://jira.mongodb.org/browse/SERVER-46630</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://github.com/mongodb/mongo/blob/82424b742342d4b35cf10eb9d471984d1e805210/src/mongo/db/storage/remove_saver.cpp#L123&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/82424b742342d4b35cf10eb9d471984d1e805210/src/mongo/db/storage/remove_saver.cpp#L123&lt;/a&gt; the output file pointer is reset to 0 to write the calculated GCM tag after the file has been encrypted.&lt;/p&gt;

&lt;p&gt;Unfortunately, the tag should appear at offset 1.  Writing the tag here will prevent easy decryption as the contents will appear to contain an invalid version, and the tag will be invalid.&lt;/p&gt;

&lt;p&gt;Note that incorrectly written saver files may still be recovered by moving the tag bytes forward by one, and writing a zero to the version byte.&lt;/p&gt;

&lt;p&gt;A fix should include creating a protector API for requesting tag offset (rather than hardcoding to 1) and moving the write as a whole behind a check for tag size (if it&apos;s zero, then there&apos;s no tag to write, e.g. CBC mode).&lt;/p&gt;</description>
                <environment></environment>
        <key id="1227566">SERVER-46630</key>
            <summary>RemoveSaver writes GCM tag to incorrect file position</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="sara.golemon@mongodb.com">Sara Golemon</assignee>
                                    <reporter username="sara.golemon@mongodb.com">Sara Golemon</reporter>
                        <labels>
                    </labels>
                <created>Wed, 4 Mar 2020 22:23:14 +0000</created>
                <updated>Sun, 29 Oct 2023 22:11:15 +0000</updated>
                            <resolved>Mon, 9 Mar 2020 22:23:41 +0000</resolved>
                                                    <fixVersion>4.2.5</fixVersion>
                    <fixVersion>4.0.17</fixVersion>
                    <fixVersion>4.4.0-rc0</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2969663" author="xgen-internal-githook" created="Thu, 12 Mar 2020 04:27:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sara Golemon&apos;, &apos;username&apos;: &apos;sgolemon&apos;, &apos;email&apos;: &apos;sara.golemon@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46630&quot; title=&quot;RemoveSaver writes GCM tag to incorrect file position&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46630&quot;&gt;&lt;del&gt;SERVER-46630&lt;/del&gt;&lt;/a&gt; Include data protector version byte as part of its tag&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 00817f5cb6d202af084fce94ab57b5f127c66b90)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/4ae9e5a780d90c288756f63d2ded1d955313f4f6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/4ae9e5a780d90c288756f63d2ded1d955313f4f6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2969649" author="xgen-internal-githook" created="Thu, 12 Mar 2020 03:32:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sara Golemon&apos;, &apos;username&apos;: &apos;sgolemon&apos;, &apos;email&apos;: &apos;sara.golemon@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46630&quot; title=&quot;RemoveSaver writes GCM tag to incorrect file position&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46630&quot;&gt;&lt;del&gt;SERVER-46630&lt;/del&gt;&lt;/a&gt; Include data protector version byte as part of its tag&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 00817f5cb6d202af084fce94ab57b5f127c66b90)&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/0f74fca9a69951b2c5afeb972a65cb22043c21f1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/0f74fca9a69951b2c5afeb972a65cb22043c21f1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2961156" author="xgen-internal-githook" created="Tue, 10 Mar 2020 17:08:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;sgolemon&apos;, &apos;name&apos;: &apos;Sara Golemon&apos;, &apos;email&apos;: &apos;sara.golemon@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46630&quot; title=&quot;RemoveSaver writes GCM tag to incorrect file position&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46630&quot;&gt;&lt;del&gt;SERVER-46630&lt;/del&gt;&lt;/a&gt; Include data protector version byte as part of its tag&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 00817f5cb6d202af084fce94ab57b5f127c66b90)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/2615f117a804c9e614567bebe2de8e11cad9d6a5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/2615f117a804c9e614567bebe2de8e11cad9d6a5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2955883" author="xgen-internal-githook" created="Mon, 9 Mar 2020 22:21:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;sgolemon&apos;, &apos;name&apos;: &apos;Sara Golemon&apos;, &apos;email&apos;: &apos;sara.golemon@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46630&quot; title=&quot;RemoveSaver writes GCM tag to incorrect file position&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46630&quot;&gt;&lt;del&gt;SERVER-46630&lt;/del&gt;&lt;/a&gt; Include data protector version byte as part of its tag&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/00817f5cb6d202af084fce94ab57b5f127c66b90&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/00817f5cb6d202af084fce94ab57b5f127c66b90&lt;/a&gt;&lt;/p&gt;</comment>
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