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SIG/Security Wiki
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Override package: glibc
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security/wiki
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SIG/Security Wiki
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security/wiki
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SIG/Security Wiki
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News
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Issues
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Issues
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CVE-2023-23583: microcode_ctl
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CVE-2023-4911: glibc
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CVE-2024-1086: kernel
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Packages
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Packages
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Extra package: control
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Override package: glibc
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Override package: glibc
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Table of contents
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EL9
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Changes summary
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Known-effective vulnerability mitigations and fixes
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Change log
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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" >
< 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 >
< h2 id = "el9" > EL9< a class = "headerlink" href = "#el9" title = "Permanent link" > ¶ < / a > < / h2 >
< 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 >
< h3 id = "changes-summary" > Changes summary< a class = "headerlink" href = "#changes-summary" title = "Permanent link" > ¶ < / 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 >
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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 >
< 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 >
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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 >
< 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 >
< 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
* Wed Nov 22 2023 Solar Designer < solar@openwall.com> - 2.34-83.7.el9.security.0.3
2023-11-27 13:49:44 +00:00
- 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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2023-11-27 13:49:44 +00:00
* 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
2023-10-13 20:03:09 +00:00
2023-11-27 13:49:44 +00:00
[... upstream changes ...]
2023-10-13 20:03:09 +00:00
* 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
* 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
* 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
git show 5fa32fb0f8509f4b2b1105d71b45966dfbadc099 > glibc-2.34-alt-tmpfile.patch
git show f97e5d60a6a4c9cb64e3b9ee6f5113969cf07d87 > glibc-2.34-alt-asprintf.patch
git show cd45d0f74560325cc48aedb9f56881270ab3dfab > glibc-2.34-alt-libio-bound.patch
git show 436eb1017c04aee3a553c2868d00a4b046e5e394 > glibc-2.34-owl-alt-syslog-ident.patch
git show 03a86c234873723c26b7e387c498c1332c223968 > glibc-2.34-mjt-owl-alt-syslog-timestamp.patch
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