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856 lines
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856 lines
26 KiB
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Override package: glibc
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CVE-2023-23583: microcode_ctl
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CVE-2023-4911: glibc
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Override package: glibc
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Known-effective vulnerability mitigations and fixes
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Extra package: hardened_malloc
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Override package: microcode_ctl
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Extra package: passwdqc
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<article class="md-content__inner md-typeset">
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<a href="https://git.resf.org/security/wiki/_edit/main/docs/packages/glibc.md" title="Edit this page" class="md-content__button md-icon">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4v-2m10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1 2.1 2.1Z"/></svg>
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<h1 id="override-package-glibc">Override package: glibc<a class="headerlink" href="#override-package-glibc" title="Permanent link">¶</a></h1>
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<h2 id="el9">EL9<a class="headerlink" href="#el9" title="Permanent link">¶</a></h2>
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<ul>
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<li>Version <code>2.34-83.7.el9_3.security.0.4</code></li>
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<li>Based on <code>2.34-83.el9.7</code></li>
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</ul>
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<h3 id="changes-summary">Changes summary<a class="headerlink" href="#changes-summary" title="Permanent link">¶</a></h3>
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<ul>
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<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>
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<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, further revised for Rocky Linux)</li>
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<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>
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<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>
|
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<li>In <code>fread(3)/fwrite(3)</code> check for potential integer overflow (ALT Linux)</li>
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<li>In <code>tmpfile(3)</code> use the <code>TMPDIR</code> environment variable (when not running SUID/SGID/setcap) (ALT Linux)</li>
|
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<li>When <code>qsort(3)</code> is wrongly used with a nontransitive comparison function, nevertheless be robust and avoid <a href="https://www.openwall.com/lists/oss-security/2024/01/30/7">memory corruption</a> (Qualys, Rocky Linux)</li>
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</ul>
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<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">¶</a></h4>
|
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<p><code>2.34-60.el9_2.security.0.2</code> included mitigations sufficient to avoid security exposure of <a href="../../issues/CVE-2023-4911/">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> and beyond, we retained the mitigations while rebasing on upstream EL's package with upstream fixes for these vulnerabilities (and more).</p>
|
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<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>
|
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<h3 id="change-log">Change log<a class="headerlink" href="#change-log" title="Permanent link">¶</a></h3>
|
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<div class="highlight"><pre><span></span><code>* Wed Jan 31 2024 Solar Designer <solar@openwall.com> - 2.34-83.7.el9.security.0.4
|
|
- Harden syslog ident fallback initialization to use at most 64 characters of
|
|
__progname when __libc_enable_secure, as inspired by Qualys' discovery of
|
|
related vulnerabilities in newer glibc (not yet present in this version):
|
|
https://www.openwall.com/lists/oss-security/2024/01/30/6
|
|
- Harden qsort against nontransitive comparison functions as suggested by
|
|
Qualys: https://www.openwall.com/lists/oss-security/2024/01/30/7
|
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|
|
* Wed Nov 22 2023 Solar Designer <solar@openwall.com> - 2.34-83.7.el9.security.0.3
|
|
- Rebase on 2.34-83.7, drop "our" CVE-2023-4527 patch in favor of RH's
|
|
(a similar rebase was made on Oct 6 in 2.34-60.7.el9.security.0.3 for 9.2)
|
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[... upstream changes ...]
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* Fri Oct 6 2023 Solar Designer <solar@openwall.com> - 2.34-60.7.el9.security.0.3
|
|
- Rebase on 2.34-60.7, drop "our" CVE-2023-4527 patch in favor of RH's
|
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|
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[... upstream changes ...]
|
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|
|
* Mon Oct 2 2023 Solar Designer <solar@openwall.com> - 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'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
|
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|
|
* Tue Sep 26 2023 Solar Designer <solar@openwall.com> - 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
|
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* Sat Sep 23 2023 Solar Designer <solar@openwall.com> - 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
|
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git show 5fa32fb0f8509f4b2b1105d71b45966dfbadc099 > glibc-2.34-alt-tmpfile.patch
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git show f97e5d60a6a4c9cb64e3b9ee6f5113969cf07d87 > glibc-2.34-alt-asprintf.patch
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git show cd45d0f74560325cc48aedb9f56881270ab3dfab > glibc-2.34-alt-libio-bound.patch
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git show 436eb1017c04aee3a553c2868d00a4b046e5e394 > glibc-2.34-owl-alt-syslog-ident.patch
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git show 03a86c234873723c26b7e387c498c1332c223968 > glibc-2.34-mjt-owl-alt-syslog-timestamp.patch
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</code></pre></div>
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<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date">January 31, 2024</span>
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