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<h3 id="override-packages-currently-only-for-el9">Override packages (currently only for EL9)<a class="headerlink" href="#override-packages-currently-only-for-el9" title="Permanent link">&para;</a></h3>
<ul>
<li>glibc (adds many security-hardening changes originating from Owl and ALT Linux on top of EL package)</li>
<li>openssh (fewer shared libraries exposed in sshd processes while otherwise fully matching EL package's functionality)</li>
<li><a href="packages/glibc/">glibc</a> (adds many security-hardening changes originating from Owl and ALT Linux on top of EL package)</li>
<li><a href="packages/openssh/">openssh</a> (fewer shared libraries exposed in sshd processes while otherwise fully matching EL package's functionality)</li>
</ul>
<p>The changes are described in more detail in the package changelogs.
<p>The changes are described in more detail on the per-package wiki pages linked above, as well as in the package changelogs.
More packages/changes are planned, including override packages also for EL8.</p>
<h4 id="known-effective-vulnerability-mitigations-and-fixes">Known-effective vulnerability mitigations and fixes<a class="headerlink" href="#known-effective-vulnerability-mitigations-and-fixes" title="Permanent link">&para;</a></h4>
<p><code>glibc-2.34-60.el9_2.security.0.2</code> (specifically the <code>.0.2</code> version!) includes mitigations sufficient to avoid security exposure of <a href="https://www.openwall.com/lists/oss-security/2023/10/03/2">CVE-2023-4911</a> and a backport of upstream glibc fix of <a href="https://www.openwall.com/lists/oss-security/2023/09/25/1">CVE-2023-4527</a> that was not yet in upstream EL.</p>
<p>The inclusion of additional security fixes will be "reverted" if and when those get included in upstream EL packages that we rebase our changes on.</p>
<h2 id="source-code">Source code<a class="headerlink" href="#source-code" title="Permanent link">&para;</a></h2>
<p>Just like for other Rocky Linux SIGs, the source trees for Security SIG packages are maintained in <a href="https://git.rockylinux.org/sig/security/src">per-package git repositories</a>. Each repository contains branches <code>r8</code> and/or <code>r9</code> corresponding to target EL version.</p>
<h2 id="contributing">Contributing<a class="headerlink" href="#contributing" title="Permanent link">&para;</a></h2>
@ -484,6 +564,14 @@ More packages/changes are planned, including override packages also for EL8.</p>
</thead>
<tbody>
<tr>
<td>Fredrik Nyström</td>
<td>@nscfreny</td>
</tr>
<tr>
<td>Louis Abel</td>
<td>@label</td>
</tr>
<tr>
<td>Neil Hanlon</td>
<td>@neil</td>
</tr>

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<h1 id="override-package-glibc">Override package: glibc<a class="headerlink" href="#override-package-glibc" title="Permanent link">&para;</a></h1>
<h2 id="el9">EL9<a class="headerlink" href="#el9" title="Permanent link">&para;</a></h2>
<ul>
<li>Version <code>2.34-60.7.el9_2.security.0.3</code></li>
<li>Based on <code>2.34-60.el9_2.7</code></li>
</ul>
<h3 id="changes-summary">Changes summary<a class="headerlink" href="#changes-summary" title="Permanent link">&para;</a></h3>
<ul>
<li>Distrust and/or unset many more environment variables used by current and previous glibc versions when running SUID/SGID/setcap (Owl via ALT Linux)</li>
<li>When <code>syslog(3)</code>/<code>vsyslog(3)</code> is called by a SUID/SGID/setcap program without a preceding call to <code>openlog(3)</code>, don't blindly trust <code>__progname</code> for the syslog ident (Owl via ALT Linux)</li>
<li>In <code>syslog(3)/vsyslog(3)</code> use <code>asctime_r(3)+localtime_r(3)</code> instead of <code>strftime_r()</code> so that month names don't depend on current locale settings (Owl via ALT Linux)</li>
<li>In <code>asprintf(3)/vasprintf(3)</code> reset the pointer to NULL on error, like BSDs do, so that the caller wouldn't access memory over an uninitialized or stale pointer (ALT Linux)</li>
<li>In <code>fread(3)/fwrite(3)</code> check for potential integer overflow (ALT Linux)</li>
<li>In <code>tmpfile(3)</code> use the <code>TMPDIR</code> environment variable (when not running SUID/SGID/setcap) (ALT Linux)</li>
</ul>
<h4 id="known-effective-vulnerability-mitigations-and-fixes">Known-effective vulnerability mitigations and fixes<a class="headerlink" href="#known-effective-vulnerability-mitigations-and-fixes" title="Permanent link">&para;</a></h4>
<p><code>2.34-60.el9_2.security.0.2</code> included mitigations sufficient to avoid security exposure of <a href="https://www.openwall.com/lists/oss-security/2023/10/03/2">CVE-2023-4911</a> and a backport of upstream glibc fix of <a href="https://www.openwall.com/lists/oss-security/2023/09/25/1">CVE-2023-4527</a> that was not yet in upstream EL. In the update to <code>2.34-60.7.el9_2.security.0.3</code>, we retained the mitigations while rebasing on upstream EL's package with upstream fixes for these vulnerabilities (and more).</p>
<p>In general, inclusion of additional security fixes will be "reverted" if and when those get included in upstream EL packages that we rebase our changes on.</p>
<h3 id="change-log">Change log<a class="headerlink" href="#change-log" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code>* Fri Oct 6 2023 Solar Designer &lt;solar@openwall.com&gt; - 2.34-60.7.el9.security.0.3
- Rebase on 2.34-60.7, drop &quot;our&quot; CVE-2023-4527 patch in favor of RH&#39;s
* Mon Sep 25 2023 Florian Weimer &lt;fweimer@redhat.com&gt; - 2.34-60.7
- Fix memory leak regression in getaddrinfo (RHEL-2425)
* Tue Sep 19 2023 Carlos O&#39;Donell &lt;carlos@redhat.com&gt; - 2.34-60.6
- CVE-2023-4911 glibc: buffer overflow in ld.so leading to privilege escalation (RHEL-2999)
* Tue Sep 19 2023 Carlos O&#39;Donell &lt;carlos@redhat.com&gt; - 2.34-60.5
- Revert: Always call destructors in reverse constructor order (RHEL-3385)
* Mon Sep 18 2023 Siddhesh Poyarekar &lt;siddhesh@redhat.com&gt; - 2.34-60.4
- CVE-2023-4806 glibc: potential use-after-free in getaddrinfo (RHEL-2425)
* Fri Sep 15 2023 Siddhesh Poyarekar &lt;siddhesh@redhat.com&gt; - 2.34-60.3
- CVE-2023-4813: potential use-after-free in gaih_inet (RHEL-2437)
* Fri Sep 15 2023 Carlos O&#39;Donell &lt;carlos@redhat.com&gt; - 2.34-60.2
- CVE-2023-4527: Stack read overflow in getaddrinfo in no-aaaa mode (#2234715)
* Wed Sep 13 2023 Florian Weimer &lt;fweimer@redhat.com&gt; - 2.34-60.1
- Always call destructors in reverse constructor order (RHEL-3385)
* Mon Oct 2 2023 Solar Designer &lt;solar@openwall.com&gt; - 2.34-60.el9.security.0.2
- Add glibc-owl-alt-sanitize-env.patch stitched from several ALT Linux commits
as none of their revisions matched this package&#39;s set of backports as-is
- Add glibc-upstream-no-aaaa-CVE-2023-4527.patch based on upstream commit
bd77dd7e73e3530203be1c52c8a29d08270cb25d fixing
CVE-2023-4527: Stack read overflow with large TCP responses in no-aaaa mode
* Tue Sep 26 2023 Solar Designer &lt;solar@openwall.com&gt; - 2.34-60.el9.security.0.1
- Revise the texinfo documentation edit of glibc-2.34-alt-asprintf.patch via
glibc-2.34-rocky-asprintf.patch
* Sat Sep 23 2023 Solar Designer &lt;solar@openwall.com&gt; - 2.34-60.el9.security.0.0
- Add some of the patches from ALT Linux as of when they were at 2.34:
https://git.altlinux.org/gears/g/glibc.git
git show 5fa32fb0f8509f4b2b1105d71b45966dfbadc099 &gt; glibc-2.34-alt-tmpfile.patch
git show f97e5d60a6a4c9cb64e3b9ee6f5113969cf07d87 &gt; glibc-2.34-alt-asprintf.patch
git show cd45d0f74560325cc48aedb9f56881270ab3dfab &gt; glibc-2.34-alt-libio-bound.patch
git show 436eb1017c04aee3a553c2868d00a4b046e5e394 &gt; glibc-2.34-owl-alt-syslog-ident.patch
git show 03a86c234873723c26b7e387c498c1332c223968 &gt; glibc-2.34-mjt-owl-alt-syslog-timestamp.patch
</code></pre></div>
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<h1 id="override-package-openssh">Override package: openssh<a class="headerlink" href="#override-package-openssh" title="Permanent link">&para;</a></h1>
<h2 id="el9">EL9<a class="headerlink" href="#el9" title="Permanent link">&para;</a></h2>
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<li>Version <code>8.7p1-30.el9_2.security.0.2</code></li>
<li>Based on <code>8.7p1-30.el9_2</code></li>
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<h3 id="changes-summary">Changes summary<a class="headerlink" href="#changes-summary" title="Permanent link">&para;</a></h3>
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<li>Instead of linking against <code>libsystemd</code>, load it dynamically in a temporary child process to avoid polluting actual <code>sshd</code>'s address space with that library and its many dependencies (shortens <code>ldd sshd</code> output from 28 to 20 lines)</li>
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<h3 id="change-log">Change log<a class="headerlink" href="#change-log" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code>* Sat Oct 07 2023 Solar Designer &lt;solar@openwall.com&gt; 8.7p1-30.el9.security.0.2
- Load libsystemd.so.0, not libsystemd.so, as the latter is only provided by
systemd-devel
* Mon Aug 28 2023 Solar Designer &lt;solar@openwall.com&gt; 8.7p1-30.el9.security.0.1
- Instead of linking against libsystemd, load it dynamically in a temporary
child process to avoid polluting actual sshd&#39;s address space with that
library and its many dependencies (shortens &quot;ldd sshd&quot; from 28 to 20 lines)
</code></pre></div>
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<lastmod>2023-10-13</lastmod>
<changefreq>daily</changefreq>
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<lastmod>2023-10-13</lastmod>
<changefreq>daily</changefreq>
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<loc>https://sig-security.rocky.page/packages/openssh/</loc>
<lastmod>2023-10-13</lastmod>
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